2a+19=21

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Solution for 2a+19=21 equation: 



2a+19=21

We move all terms to the left:

2a+19-(21)=0

We add all the numbers together, and all the variables

2a-2=0

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

2a=2

a=2/2

a=1

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