3a-7=-13

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Solution for 3a-7=-13 equation: 



3a-7=-13

We move all terms to the left:

3a-7-(-13)=0

We add all the numbers together, and all the variables

3a+6=0

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

3a=-6

a=-6/3

a=-2

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