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144+8\left(x+3\right)\times 18=16\left(x+3\right)
Variable x cannot be equal to -3 since division by zero is not defined. Multiply both sides of the equation by 8\left(x+3\right).
144+144\left(x+3\right)=16\left(x+3\right)
Multiply 8 and 18 to get 144.
144+144x+432=16\left(x+3\right)
Use the distributive property to multiply 144 by x+3.
576+144x=16\left(x+3\right)
Add 144 and 432 to get 576.
576+144x=16x+48
Use the distributive property to multiply 16 by x+3.
576+144x-16x=48
Subtract 16x from both sides.
576+128x=48
Combine 144x and -16x to get 128x.
128x=48-576
Subtract 576 from both sides.
128x=-528
Subtract 576 from 48 to get -528.
x=\frac{-528}{128}
Divide both sides by 128.
x=-\frac{33}{8}
Reduce the fraction \frac{-528}{128} to lowest terms by extracting and canceling out 16.