Solve for c
c=3
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9c-6-2c=15
Subtract 2c from both sides.
7c-6=15
Combine 9c and -2c to get 7c.
7c=15+6
Add 6 to both sides.
7c=21
Add 15 and 6 to get 21.
c=\frac{21}{7}
Divide both sides by 7.
c=3
Divide 21 by 7 to get 3.
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