Solve for y
y=\frac{3}{7}\approx 0.428571429
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12+7y=15
Multiply 3 and 4 to get 12.
7y=15-12
Subtract 12 from both sides.
7y=3
Subtract 12 from 15 to get 3.
y=\frac{3}{7}
Divide both sides by 7.
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