3+2a-1=8

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Solution for 3+2a-1=8 equation: 



3+2a-1=8

We move all terms to the left:

3+2a-1-(8)=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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