x and four times y is equal to twenty

Question

the sum of x and four times y is equal to twenty

how do you solve this equation? please shopw me solve

Answer 1

X + 4Y = 20.

You cannot find both x and y as an exact number. You can find x in terms of y and y in terms of x though.

 

subtracting 4y from both sides gives χ= 20-4y

 

subtracting x from both sides of the original equationgives

4y = 20 -x

dividing by 4 gives y= 5 - (x/4)

if you graph this function, (just google it) you will see that for each value of y, x is different.