Solve for y
y=-1
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2y+9=7
Swap sides so that all variable terms are on the left hand side.
2y=7-9
Subtract 9 from both sides.
2y=-2
Subtract 9 from 7 to get -2.
y=\frac{-2}{2}
Divide both sides by 2.
y=-1
Divide -2 by 2 to get -1.
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