Question

-4x + 3(2x - 5) = 31

Answer 1

PEMDAS
First you need to distribute the 3 to 2x and -5

Answer 2

-4+3(6x-15)=31

Answer 3

@thenikko

Answer 4

except you got rid of the 3 ^^

Answer 5

-4+6x-15=31

Answer 6

now combine like terms

Answer 7

You can look at this if you are having trouble understand what like terms are: http://study.com/academy/lesson/combining-like-terms-definition-simplifying-practice.html