y=40-2(56-2y)

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Solution for y=40-2(56-2y) equation: 


Simplifying
y = 40 + -2(56 + -2y)
y = 40 + (56 * -2 + -2y * -2)
y = 40 + (-112 + 4y)

Combine like terms: 40 + -112 = -72
y = -72 + 4y

Solving
y = -72 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
y + -4y = -72 + 4y + -4y

Combine like terms: y + -4y = -3y
-3y = -72 + 4y + -4y

Combine like terms: 4y + -4y = 0
-3y = -72 + 0
-3y = -72

Divide each side by '-3'.
y = 24

Simplifying
y = 24

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