7a-1=55

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Solution for 7a-1=55 equation: 



7a-1=55

We move all terms to the left:

7a-1-(55)=0

We add all the numbers together, and all the variables

7a-56=0

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

7a=56

a=56/7

a=8

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