6a-12+4=5a-9

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Solution for 6a-12+4=5a-9 equation: 



6a-12+4=5a-9

We move all terms to the left:

6a-12+4-(5a-9)=0

We add all the numbers together, and all the variables

6a-(5a-9)-8=0

We get rid of parentheses

6a-5a+9-8=0

We add all the numbers together, and all the variables

a+1=0

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

a=-1

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