a+3a-2a+5a=-42

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Solution for a+3a-2a+5a=-42 equation: 



a+3a-2a+5a=-42

We move all terms to the left:

a+3a-2a+5a-(-42)=0

We add all the numbers together, and all the variables

7a+42=0

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

7a=-42

a=-42/7

a=-6

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