Solve for y
y=4
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4y-12-y=0
Subtract y from both sides.
3y-12=0
Combine 4y and -y to get 3y.
3y=12
Add 12 to both sides. Anything plus zero gives itself.
y=\frac{12}{3}
Divide both sides by 3.
y=4
Divide 12 by 3 to get 4.
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