-x+90+30=100

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Solution for -x+90+30=100 equation:


Simplifying
-1x + 90 + 30 = 100

Reorder the terms:
90 + 30 + -1x = 100

Combine like terms: 90 + 30 = 120
120 + -1x = 100

Solving
120 + -1x = 100

Solving for variable 'x'.

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

Add '-120' to each side of the equation.
120 + -120 + -1x = 100 + -120

Combine like terms: 120 + -120 = 0
0 + -1x = 100 + -120
-1x = 100 + -120

Combine like terms: 100 + -120 = -20
-1x = -20

Divide each side by '-1'.
x = 20

Simplifying
x = 20

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