5a+-3a=-7

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Solution for 5a+-3a=-7 equation: 



5a+-3a=-7

We move all terms to the left:

5a+-3a-(-7)=0

We add all the numbers together, and all the variables

2a+7=0

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

2a=-7

a=-7/2

a=-3+1/2

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