3a+86=7a+18

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Solution for 3a+86=7a+18 equation: 



3a+86=7a+18

We move all terms to the left:

3a+86-(7a+18)=0

We get rid of parentheses

3a-7a-18+86=0

We add all the numbers together, and all the variables

-4a+68=0

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

-4a=-68

a=-68/-4

a=+17

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