-14=-7(9+a)

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Solution for -14=-7(9+a) equation: 



-14=-7(9+a)

We move all terms to the left:

-14-(-7(9+a))=0

We add all the numbers together, and all the variables

-(-7(a+9))-14=0



We calculate terms in parentheses: -(-7(a+9)), so:

-7(a+9)

We multiply parentheses

-7a-63

Back to the equation:

-(-7a-63)



We get rid of parentheses

7a+63-14=0

We add all the numbers together, and all the variables

7a+49=0

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

7a=-49

a=-49/7

a=-7

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