180=20-4y

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Solution for 180=20-4y equation:


Simplifying
180 = 20 + -4y

Solving
180 = 20 + -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.
180 + 4y = 20 + -4y + 4y

Combine like terms: -4y + 4y = 0
180 + 4y = 20 + 0
180 + 4y = 20

Add '-180' to each side of the equation.
180 + -180 + 4y = 20 + -180

Combine like terms: 180 + -180 = 0
0 + 4y = 20 + -180
4y = 20 + -180

Combine like terms: 20 + -180 = -160
4y = -160

Divide each side by '4'.
y = -40

Simplifying
y = -40

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