Solve for n
n=-10
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7n=5\left(n-4\right)
Multiply both sides of the equation by 35, the least common multiple of 5,7.
7n=5n-20
Use the distributive property to multiply 5 by n-4.
7n-5n=-20
Subtract 5n from both sides.
2n=-20
Combine 7n and -5n to get 2n.
n=\frac{-20}{2}
Divide both sides by 2.
n=-10
Divide -20 by 2 to get -10.
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