3)10-9(c-2/3)+7c-16=-2c

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To solve the equation, we will first simplify it by distributing the negative sign before the 9:

10 - 9c + 6 + 7c - 16 = -2c

Combine like terms:

10 - 9c + 6 + 7c - 16 = -2c
(10 + 6 - 16) + (-9c + 7c) = -2c
0 - 2c = -2c

Now we are left with:

-2c = -2c

This equation is an identity, which means that it is true for all values of c. The solution to this equation is all real numbers for c.