Solve for a
a=-\frac{1}{4}=-0.25
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3\left(2a-1\right)-12=2\left(5a-7\right)
Multiply both sides of the equation by 12, the least common multiple of 4,6.
6a-3-12=2\left(5a-7\right)
Use the distributive property to multiply 3 by 2a-1.
6a-15=2\left(5a-7\right)
Subtract 12 from -3 to get -15.
6a-15=10a-14
Use the distributive property to multiply 2 by 5a-7.
6a-15-10a=-14
Subtract 10a from both sides.
-4a-15=-14
Combine 6a and -10a to get -4a.
-4a=-14+15
Add 15 to both sides.
-4a=1
Add -14 and 15 to get 1.
a=\frac{1}{-4}
Divide both sides by -4.
a=-\frac{1}{4}
Fraction \frac{1}{-4} can be rewritten as -\frac{1}{4} by extracting the negative sign.
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