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6\times 3\left(x+1\right)-6\left(3x-4\right)=4\times 2\left(x-2\right)-9
Multiply both sides of the equation by 12, the least common multiple of 2,3,4.
18\left(x+1\right)-6\left(3x-4\right)=4\times 2\left(x-2\right)-9
Multiply 6 and 3 to get 18.
18x+18-6\left(3x-4\right)=4\times 2\left(x-2\right)-9
Use the distributive property to multiply 18 by x+1.
18x+18-18x+24=4\times 2\left(x-2\right)-9
Use the distributive property to multiply -6 by 3x-4.
18+24=4\times 2\left(x-2\right)-9
Combine 18x and -18x to get 0.
42=4\times 2\left(x-2\right)-9
Add 18 and 24 to get 42.
42=8\left(x-2\right)-9
Multiply 4 and 2 to get 8.
42=8x-16-9
Use the distributive property to multiply 8 by x-2.
42=8x-25
Subtract 9 from -16 to get -25.
8x-25=42
Swap sides so that all variable terms are on the left hand side.
8x=42+25
Add 25 to both sides.
8x=67
Add 42 and 25 to get 67.
x=\frac{67}{8}
Divide both sides by 8.