Solve for x
x=\frac{2}{3}\approx 0.666666667
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12x+9-9x=11
Use the distributive property to multiply 9 by 1-x.
3x+9=11
Combine 12x and -9x to get 3x.
3x=11-9
Subtract 9 from both sides.
3x=2
Subtract 9 from 11 to get 2.
x=\frac{2}{3}
Divide both sides by 3.
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