2a-a-a+a=7

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



2a-a-a+a=7

We move all terms to the left:

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

We add all the numbers together, and all the variables

a-7=0

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

a=7

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