9=7-2y

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Solution for 9=7-2y equation:


Simplifying
9 = 7 + -2y

Solving
9 = 7 + -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.
9 + 2y = 7 + -2y + 2y

Combine like terms: -2y + 2y = 0
9 + 2y = 7 + 0
9 + 2y = 7

Add '-9' to each side of the equation.
9 + -9 + 2y = 7 + -9

Combine like terms: 9 + -9 = 0
0 + 2y = 7 + -9
2y = 7 + -9

Combine like terms: 7 + -9 = -2
2y = -2

Divide each side by '2'.
y = -1

Simplifying
y = -1

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