5a+7=8a+-2

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Solution for 5a+7=8a+-2 equation: 



5a+7=8a+-2

We move all terms to the left:

5a+7-(8a+-2)=0

We add all the numbers together, and all the variables

5a-(8a-2)+7=0

We get rid of parentheses

5a-8a+2+7=0

We add all the numbers together, and all the variables

-3a+9=0

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

-3a=-9

a=-9/-3

a=+3

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