10-7a=66

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Solution for 10-7a=66 equation: 



10-7a=66

We move all terms to the left:

10-7a-(66)=0

We add all the numbers together, and all the variables

-7a-56=0

We move all terms containing a to the left, all other terms to the right

-7a=56

a=56/-7

a=-8

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