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-\frac{5}{4}x=\frac{19}{8}+\frac{1}{8}
Add \frac{1}{8} to both sides.
-\frac{5}{4}x=\frac{19+1}{8}
Since \frac{19}{8} and \frac{1}{8} have the same denominator, add them by adding their numerators.
-\frac{5}{4}x=\frac{20}{8}
Add 19 and 1 to get 20.
-\frac{5}{4}x=\frac{5}{2}
Reduce the fraction \frac{20}{8} to lowest terms by extracting and canceling out 4.
x=\frac{5}{2}\left(-\frac{4}{5}\right)
Multiply both sides by -\frac{4}{5}, the reciprocal of -\frac{5}{4}.
x=\frac{5\left(-4\right)}{2\times 5}
Multiply \frac{5}{2} times -\frac{4}{5} by multiplying numerator times numerator and denominator times denominator.
x=\frac{-4}{2}
Cancel out 5 in both numerator and denominator.
x=-2
Divide -4 by 2 to get -2.