Solve for w
w=-2
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25=3w+21-5w
Use the distributive property to multiply 3 by w+7.
25=-2w+21
Combine 3w and -5w to get -2w.
-2w+21=25
Swap sides so that all variable terms are on the left hand side.
-2w=25-21
Subtract 21 from both sides.
-2w=4
Subtract 21 from 25 to get 4.
w=\frac{4}{-2}
Divide both sides by -2.
w=-2
Divide 4 by -2 to get -2.
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