Question

X + x + 2 + x + 4 = 81

Answer 1

1. 3x+6=81
2.-6. =-6
3.3x=75
4. 3x/3 =75/3
5. x=25

Answer 2

X + X + 2 + X + 4 = 81

First, combine numbers and Xs.

3x + 6 = 81

      -6    -6

       3x = 75

        X = 25                ← divide by 3 on both sides