a-5a+10=90

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Solution for a-5a+10=90 equation: 



a-5a+10=90

We move all terms to the left:

a-5a+10-(90)=0

We add all the numbers together, and all the variables

-4a-80=0

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

-4a=80

a=80/-4

a=-20

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