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x=\frac{3x-9}{2}
Use the distributive property to multiply 3 by x-3.
x=\frac{3}{2}x-\frac{9}{2}
Divide each term of 3x-9 by 2 to get \frac{3}{2}x-\frac{9}{2}.
x-\frac{3}{2}x=-\frac{9}{2}
Subtract \frac{3}{2}x from both sides.
-\frac{1}{2}x=-\frac{9}{2}
Combine x and -\frac{3}{2}x to get -\frac{1}{2}x.
x=-\frac{9}{2}\left(-2\right)
Multiply both sides by -2, the reciprocal of -\frac{1}{2}.
x=\frac{-9\left(-2\right)}{2}
Express -\frac{9}{2}\left(-2\right) as a single fraction.
x=\frac{18}{2}
Multiply -9 and -2 to get 18.
x=9
Divide 18 by 2 to get 9.