2a+3=20-1

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Solution for 2a+3=20-1 equation: 



2a+3=20-1

We move all terms to the left:

2a+3-(20-1)=0

We add all the numbers together, and all the variables

2a+3-19=0

We add all the numbers together, and all the variables

2a-16=0

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

2a=16

a=16/2

a=8

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