-7a+3-8a=15-30

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Solution for -7a+3-8a=15-30 equation: 



-7a+3-8a=15-30

We move all terms to the left:

-7a+3-8a-(15-30)=0

We add all the numbers together, and all the variables

-7a-8a+3-(-15)=0

We add all the numbers together, and all the variables

-15a+18=0

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

-15a=-18

a=-18/-15

a=1+1/5

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