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3\left(1+5x\right)-18=2\left(x+4\right)
Multiply both sides of the equation by 6, the least common multiple of 2,3.
3+15x-18=2\left(x+4\right)
Use the distributive property to multiply 3 by 1+5x.
-15+15x=2\left(x+4\right)
Subtract 18 from 3 to get -15.
-15+15x=2x+8
Use the distributive property to multiply 2 by x+4.
-15+15x-2x=8
Subtract 2x from both sides.
-15+13x=8
Combine 15x and -2x to get 13x.
13x=8+15
Add 15 to both sides.
13x=23
Add 8 and 15 to get 23.
x=\frac{23}{13}
Divide both sides by 13.