72=90-1x

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Solution for 72=90-1x equation:


Simplifying
72 = 90 + -1x

Solving
72 = 90 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
72 + x = 90 + -1x + x

Combine like terms: -1x + x = 0
72 + x = 90 + 0
72 + x = 90

Add '-72' to each side of the equation.
72 + -72 + x = 90 + -72

Combine like terms: 72 + -72 = 0
0 + x = 90 + -72
x = 90 + -72

Combine like terms: 90 + -72 = 18
x = 18

Simplifying
x = 18

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