Solve for y
y<3
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-4y>-13+1
Add 1 to both sides.
-4y>-12
Add -13 and 1 to get -12.
y<\frac{-12}{-4}
Divide both sides by -4. Since -4 is negative, the inequality direction is changed.
y<3
Divide -12 by -4 to get 3.
Examples
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Matrix
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Limits
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