Question

Twice a number increased by 12 is equal to 31 less than three times the number

Answer 1

the answer is 43. you set the variable x equal to the words given in the equation. then you get the x terms on the same side and everything else on the other side and solve

Answer 2

x= the number
2x+12=3x-31

2x-3x= -31x-12
-x= -43

-x/-x= x
-43/-x= 43

x=43