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5\left(x-9\right)=8\left(x+1\right)
Multiply both sides of the equation by 40, the least common multiple of 8,5.
5x-45=8\left(x+1\right)
Use the distributive property to multiply 5 by x-9.
5x-45=8x+8
Use the distributive property to multiply 8 by x+1.
5x-45-8x=8
Subtract 8x from both sides.
-3x-45=8
Combine 5x and -8x to get -3x.
-3x=8+45
Add 45 to both sides.
-3x=53
Add 8 and 45 to get 53.
x=\frac{53}{-3}
Divide both sides by -3.
x=-\frac{53}{3}
Fraction \frac{53}{-3} can be rewritten as -\frac{53}{3} by extracting the negative sign.