7-2*a=13

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Solution for 7-2*a=13 equation: 



7-2a=13

We move all terms to the left:

7-2a-(13)=0

We add all the numbers together, and all the variables

-2a-6=0

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

-2a=6

a=6/-2

a=-3

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