9a+4-7a=8

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Solution for 9a+4-7a=8 equation: 



9a+4-7a=8

We move all terms to the left:

9a+4-7a-(8)=0

We add all the numbers together, and all the variables

2a-4=0

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

2a=4

a=4/2

a=2

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