-7a+9+3a=49

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Solution for -7a+9+3a=49 equation: 



-7a+9+3a=49

We move all terms to the left:

-7a+9+3a-(49)=0

We add all the numbers together, and all the variables

-4a-40=0

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

-4a=40

a=40/-4

a=-10

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