4a-7+7a-2=90

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Solution for 4a-7+7a-2=90 equation: 



4a-7+7a-2=90

We move all terms to the left:

4a-7+7a-2-(90)=0

We add all the numbers together, and all the variables

11a-99=0

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

11a=99

a=99/11

a=9

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