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3\left(2r+8\right)=4\left(3r-6\right)
Multiply both sides of the equation by 12, the least common multiple of 4,3.
6r+24=4\left(3r-6\right)
Use the distributive property to multiply 3 by 2r+8.
6r+24=12r-24
Use the distributive property to multiply 4 by 3r-6.
6r+24-12r=-24
Subtract 12r from both sides.
-6r+24=-24
Combine 6r and -12r to get -6r.
-6r=-24-24
Subtract 24 from both sides.
-6r=-48
Subtract 24 from -24 to get -48.
r=\frac{-48}{-6}
Divide both sides by -6.
r=8
Divide -48 by -6 to get 8.