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7y-12=14y
Multiply both sides of the equation by 42, the least common multiple of 6,7,3.
7y-12-14y=0
Subtract 14y from both sides.
-7y-12=0
Combine 7y and -14y to get -7y.
-7y=12
Add 12 to both sides. Anything plus zero gives itself.
y=\frac{12}{-7}
Divide both sides by -7.
y=-\frac{12}{7}
Fraction \frac{12}{-7} can be rewritten as -\frac{12}{7} by extracting the negative sign.