Solve for y
y=-\frac{1}{3}\approx -0.333333333
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-9y=-1+4
Add 4 to both sides.
-9y=3
Add -1 and 4 to get 3.
y=\frac{3}{-9}
Divide both sides by -9.
y=-\frac{1}{3}
Reduce the fraction \frac{3}{-9} to lowest terms by extracting and canceling out 3.
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