Solve for z
z=-2
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7z+30=16
Swap sides so that all variable terms are on the left hand side.
7z=16-30
Subtract 30 from both sides.
7z=-14
Subtract 30 from 16 to get -14.
z=\frac{-14}{7}
Divide both sides by 7.
z=-2
Divide -14 by 7 to get -2.
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