90-x=180-x(.25)

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Solution for 90-x=180-x(.25) equation:


Simplifying
90 + -1x = 180 + -1x(0.25)

Reorder the terms for easier multiplication:
90 + -1x = 180 + -1 * 0.25x

Multiply -1 * 0.25
90 + -1x = 180 + -0.25x

Solving
90 + -1x = 180 + -0.25x

Solving for variable 'x'.

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

Add '0.25x' to each side of the equation.
90 + -1x + 0.25x = 180 + -0.25x + 0.25x

Combine like terms: -1x + 0.25x = -0.75x
90 + -0.75x = 180 + -0.25x + 0.25x

Combine like terms: -0.25x + 0.25x = 0.00
90 + -0.75x = 180 + 0.00
90 + -0.75x = 180

Add '-90' to each side of the equation.
90 + -90 + -0.75x = 180 + -90

Combine like terms: 90 + -90 = 0
0 + -0.75x = 180 + -90
-0.75x = 180 + -90

Combine like terms: 180 + -90 = 90
-0.75x = 90

Divide each side by '-0.75'.
x = -120

Simplifying
x = -120

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