1 (4x - 8) + 3x = 36

The 1 infront of the parentheses multiples whatever is inside the parentheses. So it simplifies to 4x + 8 + 3x = 36

(the 8 used to be negative)

then you combine the x's:

7x + 8 = 36

then you do the opposite on the other side:

7x = 36 - 8

then it becomes simplified:

7x = 28

then you divide:

28/7

x = 4

The answer would be 6.3