72a+45=69a-84

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Solution for 72a+45=69a-84 equation: 



72a+45=69a-84

We move all terms to the left:

72a+45-(69a-84)=0

We get rid of parentheses

72a-69a+84+45=0

We add all the numbers together, and all the variables

3a+129=0

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

3a=-129

a=-129/3

a=-43

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