Solve for x
x = \frac{4}{3} = 1\frac{1}{3} \approx 1.333333333
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12=9x
Combine 5x and 4x to get 9x.
9x=12
Swap sides so that all variable terms are on the left hand side.
x=\frac{12}{9}
Divide both sides by 9.
x=\frac{4}{3}
Reduce the fraction \frac{12}{9} to lowest terms by extracting and canceling out 3.
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Limits
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