Solve for k
k=-4
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-3=4k+28-15
Use the distributive property to multiply 4 by k+7.
-3=4k+13
Subtract 15 from 28 to get 13.
4k+13=-3
Swap sides so that all variable terms are on the left hand side.
4k=-3-13
Subtract 13 from both sides.
4k=-16
Subtract 13 from -3 to get -16.
k=\frac{-16}{4}
Divide both sides by 4.
k=-4
Divide -16 by 4 to get -4.
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