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3\left(3x+9\right)-2\left(2x-4\right)=12
Multiply both sides of the equation by 6, the least common multiple of 2,3.
9x+27-2\left(2x-4\right)=12
Use the distributive property to multiply 3 by 3x+9.
9x+27-4x+8=12
Use the distributive property to multiply -2 by 2x-4.
5x+27+8=12
Combine 9x and -4x to get 5x.
5x+35=12
Add 27 and 8 to get 35.
5x=12-35
Subtract 35 from both sides.
5x=-23
Subtract 35 from 12 to get -23.
x=\frac{-23}{5}
Divide both sides by 5.
x=-\frac{23}{5}
Fraction \frac{-23}{5} can be rewritten as -\frac{23}{5} by extracting the negative sign.