180=-40-8x+21x

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Solution for 180=-40-8x+21x equation:


Simplifying
180 = -40 + -8x + 21x

Combine like terms: -8x + 21x = 13x
180 = -40 + 13x

Solving
180 = -40 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
180 + -13x = -40 + 13x + -13x

Combine like terms: 13x + -13x = 0
180 + -13x = -40 + 0
180 + -13x = -40

Add '-180' to each side of the equation.
180 + -180 + -13x = -40 + -180

Combine like terms: 180 + -180 = 0
0 + -13x = -40 + -180
-13x = -40 + -180

Combine like terms: -40 + -180 = -220
-13x = -220

Divide each side by '-13'.
x = 16.92307692

Simplifying
x = 16.92307692

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