-7a+5+8a=7-21

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Solution for -7a+5+8a=7-21 equation: 



-7a+5+8a=7-21

We move all terms to the left:

-7a+5+8a-(7-21)=0

We add all the numbers together, and all the variables

-7a+8a+5-(-14)=0

We add all the numbers together, and all the variables

a+19=0

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

a=-19

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