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40-5\left(3x-7\right)=4\left(x+17\right)
Multiply both sides of the equation by 20, the least common multiple of 4,5.
40-15x+35=4\left(x+17\right)
Use the distributive property to multiply -5 by 3x-7.
75-15x=4\left(x+17\right)
Add 40 and 35 to get 75.
75-15x=4x+68
Use the distributive property to multiply 4 by x+17.
75-15x-4x=68
Subtract 4x from both sides.
75-19x=68
Combine -15x and -4x to get -19x.
-19x=68-75
Subtract 75 from both sides.
-19x=-7
Subtract 75 from 68 to get -7.
x=\frac{-7}{-19}
Divide both sides by -19.
x=\frac{7}{19}
Fraction \frac{-7}{-19} can be simplified to \frac{7}{19} by removing the negative sign from both the numerator and the denominator.