180-y=2(90-y)

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Solution for 180-y=2(90-y) equation:


Simplifying
180 + -1y = 2(90 + -1y)
180 + -1y = (90 * 2 + -1y * 2)
180 + -1y = (180 + -2y)

Add '-180' to each side of the equation.
180 + -180 + -1y = 180 + -180 + -2y

Combine like terms: 180 + -180 = 0
0 + -1y = 180 + -180 + -2y
-1y = 180 + -180 + -2y

Combine like terms: 180 + -180 = 0
-1y = 0 + -2y
-1y = -2y

Solving
-1y = -2y

Solving for variable 'y'.

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

Add '2y' to each side of the equation.
-1y + 2y = -2y + 2y

Combine like terms: -1y + 2y = 1y
1y = -2y + 2y

Combine like terms: -2y + 2y = 0
1y = 0

Divide each side by '1'.
y = 0

Simplifying
y = 0

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