19a-26a=21

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Solution for 19a-26a=21 equation: 



19a-26a=21

We move all terms to the left:

19a-26a-(21)=0

We add all the numbers together, and all the variables

-7a-21=0

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

-7a=21

a=21/-7

a=-3

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