-1-2a=7a+13

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Solution for -1-2a=7a+13 equation: 



-1-2a=7a+13

We move all terms to the left:

-1-2a-(7a+13)=0

We get rid of parentheses

-2a-7a-13-1=0

We add all the numbers together, and all the variables

-9a-14=0

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

-9a=14

a=14/-9

a=-1+5/9

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