15a-4=3a-76

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Solution for 15a-4=3a-76 equation: 



15a-4=3a-76

We move all terms to the left:

15a-4-(3a-76)=0

We get rid of parentheses

15a-3a+76-4=0

We add all the numbers together, and all the variables

12a+72=0

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

12a=-72

a=-72/12

a=-6

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