3a-7=12+4

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Solution for 3a-7=12+4 equation: 



3a-7=12+4

We move all terms to the left:

3a-7-(12+4)=0

We add all the numbers together, and all the variables

3a-7-16=0

We add all the numbers together, and all the variables

3a-23=0

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

3a=23

a=23/3

a=7+2/3

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