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30-6\left(3-4x\right)+20x=45
Multiply both sides of the equation by 30, the least common multiple of 5,3,2.
30-18+24x+20x=45
Use the distributive property to multiply -6 by 3-4x.
12+24x+20x=45
Subtract 18 from 30 to get 12.
12+44x=45
Combine 24x and 20x to get 44x.
44x=45-12
Subtract 12 from both sides.
44x=33
Subtract 12 from 45 to get 33.
x=\frac{33}{44}
Divide both sides by 44.
x=\frac{3}{4}
Reduce the fraction \frac{33}{44} to lowest terms by extracting and canceling out 11.