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x=\frac{5x+40}{3}
Use the distributive property to multiply 5 by x+8.
x=\frac{5}{3}x+\frac{40}{3}
Divide each term of 5x+40 by 3 to get \frac{5}{3}x+\frac{40}{3}.
x-\frac{5}{3}x=\frac{40}{3}
Subtract \frac{5}{3}x from both sides.
-\frac{2}{3}x=\frac{40}{3}
Combine x and -\frac{5}{3}x to get -\frac{2}{3}x.
x=\frac{40}{3}\left(-\frac{3}{2}\right)
Multiply both sides by -\frac{3}{2}, the reciprocal of -\frac{2}{3}.
x=\frac{40\left(-3\right)}{3\times 2}
Multiply \frac{40}{3} times -\frac{3}{2} by multiplying numerator times numerator and denominator times denominator.
x=\frac{-120}{6}
Do the multiplications in the fraction \frac{40\left(-3\right)}{3\times 2}.
x=-20
Divide -120 by 6 to get -20.