2a-8+a+16=21

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Solution for 2a-8+a+16=21 equation: 



2a-8+a+16=21

We move all terms to the left:

2a-8+a+16-(21)=0

We add all the numbers together, and all the variables

3a-13=0

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

3a=13

a=13/3

a=4+1/3

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