140-90=x

Solution for 140-90=x equation:

Simplifying
140 + -90 = x

Combine like terms: 140 + -90 = 50
50 = x

Solving
50 = 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.
50 + -1x = x + -1x

Combine like terms: x + -1x = 0
50 + -1x = 0

Add '-50' to each side of the equation.
50 + -50 + -1x = 0 + -50

Combine like terms: 50 + -50 = 0
0 + -1x = 0 + -50
-1x = 0 + -50

Combine like terms: 0 + -50 = -50
-1x = -50

Divide each side by '-1'.
x = 50

Simplifying
x = 50