220=22(9-y)

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Solution for 220=22(9-y) equation:


Simplifying
220 = 22(9 + -1y)
220 = (9 * 22 + -1y * 22)
220 = (198 + -22y)

Solving
220 = 198 + -22y

Solving for variable 'y'.

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

Add '22y' to each side of the equation.
220 + 22y = 198 + -22y + 22y

Combine like terms: -22y + 22y = 0
220 + 22y = 198 + 0
220 + 22y = 198

Add '-220' to each side of the equation.
220 + -220 + 22y = 198 + -220

Combine like terms: 220 + -220 = 0
0 + 22y = 198 + -220
22y = 198 + -220

Combine like terms: 198 + -220 = -22
22y = -22

Divide each side by '22'.
y = -1

Simplifying
y = -1

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