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30-6\times 2x+3\left(2+x\right)=2\left(x-4\right)
Multiply both sides of the equation by 30, the least common multiple of 5,10,15.
30-12x+3\left(2+x\right)=2\left(x-4\right)
Multiply -6 and 2 to get -12.
30-12x+6+3x=2\left(x-4\right)
Use the distributive property to multiply 3 by 2+x.
36-12x+3x=2\left(x-4\right)
Add 30 and 6 to get 36.
36-9x=2\left(x-4\right)
Combine -12x and 3x to get -9x.
36-9x=2x-8
Use the distributive property to multiply 2 by x-4.
36-9x-2x=-8
Subtract 2x from both sides.
36-11x=-8
Combine -9x and -2x to get -11x.
-11x=-8-36
Subtract 36 from both sides.
-11x=-44
Subtract 36 from -8 to get -44.
x=\frac{-44}{-11}
Divide both sides by -11.
x=4
Divide -44 by -11 to get 4.