(180-x)=4(90-x)

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Solution for (180-x)=4(90-x) equation:


Simplifying
(180 + -1x) = 4(90 + -1x)

Remove parenthesis around (180 + -1x)
180 + -1x = 4(90 + -1x)
180 + -1x = (90 * 4 + -1x * 4)
180 + -1x = (360 + -4x)

Solving
180 + -1x = 360 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
180 + -1x + 4x = 360 + -4x + 4x

Combine like terms: -1x + 4x = 3x
180 + 3x = 360 + -4x + 4x

Combine like terms: -4x + 4x = 0
180 + 3x = 360 + 0
180 + 3x = 360

Add '-180' to each side of the equation.
180 + -180 + 3x = 360 + -180

Combine like terms: 180 + -180 = 0
0 + 3x = 360 + -180
3x = 360 + -180

Combine like terms: 360 + -180 = 180
3x = 180

Divide each side by '3'.
x = 60

Simplifying
x = 60

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