100=90+x+90

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Solution for 100=90+x+90 equation:


Simplifying
100 = 90 + x + 90

Reorder the terms:
100 = 90 + 90 + x

Combine like terms: 90 + 90 = 180
100 = 180 + x

Solving
100 = 180 + 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.
100 + -1x = 180 + x + -1x

Combine like terms: x + -1x = 0
100 + -1x = 180 + 0
100 + -1x = 180

Add '-100' to each side of the equation.
100 + -100 + -1x = 180 + -100

Combine like terms: 100 + -100 = 0
0 + -1x = 180 + -100
-1x = 180 + -100

Combine like terms: 180 + -100 = 80
-1x = 80

Divide each side by '-1'.
x = -80

Simplifying
x = -80

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