3(180-y)=(90-y)

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Solution for 3(180-y)=(90-y) equation:


Simplifying
3(180 + -1y) = (90 + -1y)
(180 * 3 + -1y * 3) = (90 + -1y)
(540 + -3y) = (90 + -1y)

Remove parenthesis around (90 + -1y)
540 + -3y = 90 + -1y

Solving
540 + -3y = 90 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
540 + -3y + y = 90 + -1y + y

Combine like terms: -3y + y = -2y
540 + -2y = 90 + -1y + y

Combine like terms: -1y + y = 0
540 + -2y = 90 + 0
540 + -2y = 90

Add '-540' to each side of the equation.
540 + -540 + -2y = 90 + -540

Combine like terms: 540 + -540 = 0
0 + -2y = 90 + -540
-2y = 90 + -540

Combine like terms: 90 + -540 = -450
-2y = -450

Divide each side by '-2'.
y = 225

Simplifying
y = 225

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