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9x+15=2\left(6x-3\right)
Use the distributive property to multiply 3 by 3x+5.
9x+15=12x-6
Use the distributive property to multiply 2 by 6x-3.
9x+15-12x=-6
Subtract 12x from both sides.
-3x+15=-6
Combine 9x and -12x to get -3x.
-3x=-6-15
Subtract 15 from both sides.
-3x=-21
Subtract 15 from -6 to get -21.
x=\frac{-21}{-3}
Divide both sides by -3.
x=7
Divide -21 by -3 to get 7.