-98=7+7a

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Solution for -98=7+7a equation: 



-98=7+7a

We move all terms to the left:

-98-(7+7a)=0

We add all the numbers together, and all the variables

-(7a+7)-98=0

We get rid of parentheses

-7a-7-98=0

We add all the numbers together, and all the variables

-7a-105=0

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

-7a=105

a=105/-7

a=-15

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