-266=7(4a-a)+7a

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Solution for -266=7(4a-a)+7a equation: 



-266=7(4a-a)+7a

We move all terms to the left:

-266-(7(4a-a)+7a)=0

We add all the numbers together, and all the variables

-(7(+3a)+7a)-266=0



We calculate terms in parentheses: -(7(+3a)+7a), so:

7(+3a)+7a

We add all the numbers together, and all the variables

7a+7(+3a)

We multiply parentheses

7a+21a

We add all the numbers together, and all the variables

28a

Back to the equation:

-(28a)



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

-28a=266

a=266/-28

a=-9+1/2

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