Solve for x
x=16
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15x+40=7\left(3x-8\right)
Use the distributive property to multiply 5 by 3x+8.
15x+40=21x-56
Use the distributive property to multiply 7 by 3x-8.
15x+40-21x=-56
Subtract 21x from both sides.
-6x+40=-56
Combine 15x and -21x to get -6x.
-6x=-56-40
Subtract 40 from both sides.
-6x=-96
Subtract 40 from -56 to get -96.
x=\frac{-96}{-6}
Divide both sides by -6.
x=16
Divide -96 by -6 to get 16.
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