1=7-2a

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Solution for 1=7-2a equation: 



1=7-2a

We move all terms to the left:

1-(7-2a)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

2a-7+1=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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