90-x=.25(180-x)

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


Simplifying
90 + -1x = 0.25(180 + -1x)
90 + -1x = (180 * 0.25 + -1x * 0.25)
90 + -1x = (45 + -0.25x)

Solving
90 + -1x = 45 + -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 = 45 + -0.25x + 0.25x

Combine like terms: -1x + 0.25x = -0.75x
90 + -0.75x = 45 + -0.25x + 0.25x

Combine like terms: -0.25x + 0.25x = 0.00
90 + -0.75x = 45 + 0.00
90 + -0.75x = 45

Add '-90' to each side of the equation.
90 + -90 + -0.75x = 45 + -90

Combine like terms: 90 + -90 = 0
0 + -0.75x = 45 + -90
-0.75x = 45 + -90

Combine like terms: 45 + -90 = -45
-0.75x = -45

Divide each side by '-0.75'.
x = 60

Simplifying
x = 60

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