5m+3(2m-5)=18 what is m

Question

i need to know what m equals my teachers is of no help

Answer 1

5m + 3(2m - 5) = 18

 

First multiply out the brackets:

5m + 3x(2m) + 3x(-5) = 18

5m + 6m - 15 = 18

11m - 15 = 18

 

Now add 15 to both sides of the equation:

11m - 15 + 15 = 18 + 15

11m = 33

 

Now we can divide both sides of the equation by 11 to find what m equals:

(11m)/11 = 33/11

m = 3