7a-4-5a=-8

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Solution for 7a-4-5a=-8 equation: 



7a-4-5a=-8

We move all terms to the left:

7a-4-5a-(-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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