90-47=x

Solution for 90-47=x equation:

Simplifying
90 + -47 = x

Combine like terms: 90 + -47 = 43
43 = x

Solving
43 = 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.
43 + -1x = x + -1x

Combine like terms: x + -1x = 0
43 + -1x = 0

Add '-43' to each side of the equation.
43 + -43 + -1x = 0 + -43

Combine like terms: 43 + -43 = 0
0 + -1x = 0 + -43
-1x = 0 + -43

Combine like terms: 0 + -43 = -43
-1x = -43

Divide each side by '-1'.
x = 43

Simplifying
x = 43