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3\left(3x-24\right)-4\left(3x-12\right)=192
Multiply both sides of the equation by 48, the least common multiple of 16,12.
9x-72-4\left(3x-12\right)=192
Use the distributive property to multiply 3 by 3x-24.
9x-72-12x+48=192
Use the distributive property to multiply -4 by 3x-12.
-3x-72+48=192
Combine 9x and -12x to get -3x.
-3x-24=192
Add -72 and 48 to get -24.
-3x=192+24
Add 24 to both sides.
-3x=216
Add 192 and 24 to get 216.
x=\frac{216}{-3}
Divide both sides by -3.
x=-72
Divide 216 by -3 to get -72.