2a-8=-42

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Solution for 2a-8=-42 equation: 



2a-8=-42

We move all terms to the left:

2a-8-(-42)=0

We add all the numbers together, and all the variables

2a+34=0

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

2a=-34

a=-34/2

a=-17

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