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\frac{2y-9}{10}+\frac{3\times 5}{10}=y
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 10 and 2 is 10. Multiply \frac{3}{2} times \frac{5}{5}.
\frac{2y-9+3\times 5}{10}=y
Since \frac{2y-9}{10} and \frac{3\times 5}{10} have the same denominator, add them by adding their numerators.
\frac{2y-9+15}{10}=y
Do the multiplications in 2y-9+3\times 5.
\frac{2y+6}{10}=y
Combine like terms in 2y-9+15.
\frac{1}{5}y+\frac{3}{5}=y
Divide each term of 2y+6 by 10 to get \frac{1}{5}y+\frac{3}{5}.
\frac{1}{5}y+\frac{3}{5}-y=0
Subtract y from both sides.
-\frac{4}{5}y+\frac{3}{5}=0
Combine \frac{1}{5}y and -y to get -\frac{4}{5}y.
-\frac{4}{5}y=-\frac{3}{5}
Subtract \frac{3}{5} from both sides. Anything subtracted from zero gives its negation.
y=-\frac{3}{5}\left(-\frac{5}{4}\right)
Multiply both sides by -\frac{5}{4}, the reciprocal of -\frac{4}{5}.
y=\frac{-3\left(-5\right)}{5\times 4}
Multiply -\frac{3}{5} times -\frac{5}{4} by multiplying numerator times numerator and denominator times denominator.
y=\frac{15}{20}
Do the multiplications in the fraction \frac{-3\left(-5\right)}{5\times 4}.
y=\frac{3}{4}
Reduce the fraction \frac{15}{20} to lowest terms by extracting and canceling out 5.