7a-2-4a=4

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Solution for 7a-2-4a=4 equation: 



7a-2-4a=4

We move all terms to the left:

7a-2-4a-(4)=0

We add all the numbers together, and all the variables

3a-6=0

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

3a=6

a=6/3

a=2

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