7-8=x

Solution for 7-8=x equation:

Simplifying
7 + -8 = x

Combine like terms: 7 + -8 = -1
-1 = x

Solving
-1 = x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
-1 + -1x = x + -1x

Combine like terms: x + -1x = 0
-1 + -1x = 0

Add '1' to each side of the equation.
-1 + 1 + -1x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -1x = 0 + 1
-1x = 0 + 1

Combine like terms: 0 + 1 = 1
-1x = 1

Divide each side by '-1'.
x = -1

Simplifying
x = -1