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3\left(2x-7\right)-\left(x+5\right)=-9x
Multiply both sides of the equation by 9, the least common multiple of 3,9.
6x-21-\left(x+5\right)=-9x
Use the distributive property to multiply 3 by 2x-7.
6x-21-x-5=-9x
To find the opposite of x+5, find the opposite of each term.
5x-21-5=-9x
Combine 6x and -x to get 5x.
5x-26=-9x
Subtract 5 from -21 to get -26.
5x-26+9x=0
Add 9x to both sides.
14x-26=0
Combine 5x and 9x to get 14x.
14x=26
Add 26 to both sides. Anything plus zero gives itself.
x=\frac{26}{14}
Divide both sides by 14.
x=\frac{13}{7}
Reduce the fraction \frac{26}{14} to lowest terms by extracting and canceling out 2.