Solve for y
y=-4
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31.2+7.8y=12+3y
Use the distributive property to multiply 2.6 by 12+3y.
31.2+7.8y-3y=12
Subtract 3y from both sides.
31.2+4.8y=12
Combine 7.8y and -3y to get 4.8y.
4.8y=12-31.2
Subtract 31.2 from both sides.
4.8y=-19.2
Subtract 31.2 from 12 to get -19.2.
y=\frac{-19.2}{4.8}
Divide both sides by 4.8.
y=\frac{-192}{48}
Expand \frac{-19.2}{4.8} by multiplying both numerator and the denominator by 10.
y=-4
Divide -192 by 48 to get -4.
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