Solve for w
w=-10
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-1=-5w+3w-21
Use the distributive property to multiply 3 by w-7.
-1=-2w-21
Combine -5w and 3w to get -2w.
-2w-21=-1
Swap sides so that all variable terms are on the left hand side.
-2w=-1+21
Add 21 to both sides.
-2w=20
Add -1 and 21 to get 20.
w=\frac{20}{-2}
Divide both sides by -2.
w=-10
Divide 20 by -2 to get -10.
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