5a+12=7a+8

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Solution for 5a+12=7a+8 equation: 



5a+12=7a+8

We move all terms to the left:

5a+12-(7a+8)=0

We get rid of parentheses

5a-7a-8+12=0

We add all the numbers together, and all the variables

-2a+4=0

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

-2a=-4

a=-4/-2

a=+2

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