In a+3(5a+8)=72, how do you find a?

Question

I know its three, but im not aloud to guess and check... I can't exactly figure out how to work it backwards.

Answer 1

Here are the steps for solving this problem:

a+3(5a+8)=72
a+3*5a+3*8=72
a+15a+24=72
16a=48
a=3

 

Hope that helps.

Answer 2

dolls cost $140 per carton and trucks cost $430 per cartons and a order 100 carton for $28,500 what is the number of cartons of dolls

Answer 3

what is the answer

Answer 4

expand log3m^4n^-2

Answer 5

my answer is a=5

Answer 6

Use the quadratic model P(x)=25^(2)-14x+615 to predict P(x) if equals 8

Answer 7

the answer is a=3

Answer 8

2x+4y=28

4x+4y=32

Answer 9

A+3(5A+8)=72

=A+15A+24=72

=16A=72-24

=16A/16=48/16

A=3

Answer 10

First, write out the equation: a+3(5a+8)=72.

Simply do "order of operations".

Distribute the 3 through the parentheses. a+15a+24=72.

Add like terms. 16a+24=72.

Subtract 24 from both sides. 16a=48

Divide both sides by 16. a=3

Answer 11

First, distribute the 3 to (5a+8). You will end up with 15a+24. From there, combine your like terms (a & 15a). When you reduce that side of the equation, it will read 16a+24=72. Subtract 24 from both sides to leave you with 16a=48. Finally divide both sides of the equation by 16 (a's coefficient) to get 3. As you said in the question, the ultimate answer is a=3.

Answer 12

a+3(5a+8)=72

a+3.5a+3.8= 72

a+15a+24=72

16a+24=72

16a+24-24=72-24

16a=48

16a/16 =48/16

a =3

Answer 13

your ans is right :)

Answer 14

solve linear equation with 3 varables using the addition/elimination method.

x+y+z=3

2x-5y-3z=-17

x-z=-2

and

3x+2y-z=5

-2x-y+3z=2

2x+2y+4z=14

Answer 15

Use calculus

Answer 16

x = 0; x = -7; x = 20

Answer 17

calculate the slope of the line between the points(9,-5) and (5,-1)

Answer 18

a+15a+24=72

16a+24=72

16a+24-24=72-24

16a=48

16a/16=48/16

therefore, a=3

Answer 19

 

a+3(5a+8)=72

Carry out the multiplication of the parentheses.

3(5a+8) = 15a + 24

Plug that back into the equation.

a+ 15a+24 = 72.

Can be simplified as 

16a+24 = 72

Simplified further by dividing (by 4, in this case)

4a + 6 = 18.

Now, we can subtract 6 from both sides.

4a = 12.

Divide by 4 to isolate a.

a = 3.

Answer 20

a + 15a + 24 = 72

16a + 24=72

16 a= 72-24

16a = 48

a = 3

Answer 21

a+3(5a+8)=72

multiply +3 by the numbers in the bracket

a+15a+24=72

a+15a=16a

16a+24=72

subtract 24 from both sides

16a+24-24=72-24

16a=48

divide 16 by both sides

16a/16=48/16

a=3.

I love this topic

Answer 22

expand 3(5a+8);

a+15a+24=72

a+15a=72-24

16a=48

a=48/16

a=3

Answer 23

5a²+8a+5a+24=72

=> 5a²+13a+24+72=0
      5a²+13a+96=0

next idont know

Answer 24

a+3(5a+8)=72

a+15a+24=72

16a+24=72

       -24   -24

16a=48

16a/16=a

48/16=3

a=3

Answer 25

a+3(5a+8)=72 a+15a+24=72 16a=48 a=48/16=3

Answer 26

a=63

Answer 27

a+3(5a+8)=72 => a + 15a+ 24=72 =>16a+24=72 =>16a=72-24 => 16a=48 => a=48/16 =>a=3

Answer 28

Please help me solve 1.28= x-55/17

Answer 29

a= 3 thats the answer

Answer 30

a + 3 (5a +8) = 72 a + 15a + 24 = 72 ----- multiply (3 and 5a) to get 15a then multiply (3 and 8) to get 24 16a = 72 - 24 ----- add (a and 15a) to get 16a then transpose 24 to the right side, change symbol 16a = 48 ----- subtract 24 from 72 to get 48 16a/16 =48/16 ----- divide both sides by 16 to remove the variable's coefficient and get the final answer a = 3

Answer 31

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4(9)(2) + 2(2)=88

Solver for H

Answer 32

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Answer 33

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Answer 34

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Answer 35

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A=[ 2 x-1]

    [ 4    5]

Answer 36

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Answer 37

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Answer 38

the answer is found within the ancient scriptures of beauty and love

Answer 39

9-x^2/x-3

Answer 40

(x-3)(x2-2x+1)

Answer 41

prove that the following matrices are orthogonaland find their inverse

 3/5 4/5

 4/5 -3/5

Answer 42

we first o distribute 3 from the values inside the parenthesis so it will become a+15a+24=72

then we add the a into 15a since they have the same variable 'a'.. it will become 16a (for the value of 'a' is 1)

so 16a+24=72. transpose the 24 to the right side and change its sign to negative. 16a=72-74

16a=48 the divede both side by 16 ( 16a/16=48/16 ) cancel the 16  and divide 48 by 16 and you get the answer a=3.

hope it helps