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12\left(x-1\right)-20\left(x-2\right)=15
Multiply both sides of the equation by 60, the least common multiple of 5,3,4.
12x-12-20\left(x-2\right)=15
Use the distributive property to multiply 12 by x-1.
12x-12-20x+40=15
Use the distributive property to multiply -20 by x-2.
-8x-12+40=15
Combine 12x and -20x to get -8x.
-8x+28=15
Add -12 and 40 to get 28.
-8x=15-28
Subtract 28 from both sides.
-8x=-13
Subtract 28 from 15 to get -13.
x=\frac{-13}{-8}
Divide both sides by -8.
x=\frac{13}{8}
Fraction \frac{-13}{-8} can be simplified to \frac{13}{8} by removing the negative sign from both the numerator and the denominator.