90+78=x

Solution for 90+78=x equation:

Simplifying
90 + 78 = x

Combine like terms: 90 + 78 = 168
168 = x

Solving
168 = 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.
168 + -1x = x + -1x

Combine like terms: x + -1x = 0
168 + -1x = 0

Add '-168' to each side of the equation.
168 + -168 + -1x = 0 + -168

Combine like terms: 168 + -168 = 0
0 + -1x = 0 + -168
-1x = 0 + -168

Combine like terms: 0 + -168 = -168
-1x = -168

Divide each side by '-1'.
x = 168

Simplifying
x = 168