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3\left(3-\frac{3b}{2}\right)+4b=6
Multiply both sides of the equation by 12, the least common multiple of 4,2,3.
9+3\left(-\frac{3b}{2}\right)+4b=6
Use the distributive property to multiply 3 by 3-\frac{3b}{2}.
9+\frac{-3\times 3b}{2}+4b=6
Express 3\left(-\frac{3b}{2}\right) as a single fraction.
9+\frac{-9b}{2}+4b=6
Multiply -3 and 3 to get -9.
\frac{-9b}{2}+4b=6-9
Subtract 9 from both sides.
\frac{-9b}{2}+4b=-3
Subtract 9 from 6 to get -3.
-9b+8b=-6
Multiply both sides of the equation by 2.
-b=-6
Combine -9b and 8b to get -b.
b=6
Multiply both sides by -1.