3a-5a=7-1

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Solution for 3a-5a=7-1 equation: 



3a-5a=7-1

We move all terms to the left:

3a-5a-(7-1)=0

We add all the numbers together, and all the variables

3a-5a-6=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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