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-\frac{3}{5}+\frac{2}{3}=-\frac{5}{4}y+\frac{2}{5}y
Fraction \frac{-3}{5} can be rewritten as -\frac{3}{5} by extracting the negative sign.
-\frac{9}{15}+\frac{10}{15}=-\frac{5}{4}y+\frac{2}{5}y
Least common multiple of 5 and 3 is 15. Convert -\frac{3}{5} and \frac{2}{3} to fractions with denominator 15.
\frac{-9+10}{15}=-\frac{5}{4}y+\frac{2}{5}y
Since -\frac{9}{15} and \frac{10}{15} have the same denominator, add them by adding their numerators.
\frac{1}{15}=-\frac{5}{4}y+\frac{2}{5}y
Add -9 and 10 to get 1.
\frac{1}{15}=-\frac{17}{20}y
Combine -\frac{5}{4}y and \frac{2}{5}y to get -\frac{17}{20}y.
-\frac{17}{20}y=\frac{1}{15}
Swap sides so that all variable terms are on the left hand side.
y=\frac{1}{15}\left(-\frac{20}{17}\right)
Multiply both sides by -\frac{20}{17}, the reciprocal of -\frac{17}{20}.
y=\frac{1\left(-20\right)}{15\times 17}
Multiply \frac{1}{15} times -\frac{20}{17} by multiplying numerator times numerator and denominator times denominator.
y=\frac{-20}{255}
Do the multiplications in the fraction \frac{1\left(-20\right)}{15\times 17}.
y=-\frac{4}{51}
Reduce the fraction \frac{-20}{255} to lowest terms by extracting and canceling out 5.