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21x-15=15x-1
Use the distributive property to multiply 3 by 7x-5.
21x-15-15x=-1
Subtract 15x from both sides.
6x-15=-1
Combine 21x and -15x to get 6x.
6x=-1+15
Add 15 to both sides.
6x=14
Add -1 and 15 to get 14.
x=\frac{14}{6}
Divide both sides by 6.
x=\frac{7}{3}
Reduce the fraction \frac{14}{6} to lowest terms by extracting and canceling out 2.