3a-7+4a=7

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



3a-7+4a=7

We move all terms to the left:

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

We add all the numbers together, and all the variables

7a-14=0

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

7a=14

a=14/7

a=2

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