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3\left(x+2\right)=5\left(x-4\right)
Multiply both sides of the equation by 15, the least common multiple of 5,3.
3x+6=5\left(x-4\right)
Use the distributive property to multiply 3 by x+2.
3x+6=5x-20
Use the distributive property to multiply 5 by x-4.
3x+6-5x=-20
Subtract 5x from both sides.
-2x+6=-20
Combine 3x and -5x to get -2x.
-2x=-20-6
Subtract 6 from both sides.
-2x=-26
Subtract 6 from -20 to get -26.
x=\frac{-26}{-2}
Divide both sides by -2.
x=13
Divide -26 by -2 to get 13.