7a+3=80

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Solution for 7a+3=80 equation: 



7a+3=80

We move all terms to the left:

7a+3-(80)=0

We add all the numbers together, and all the variables

7a-77=0

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

7a=77

a=77/7

a=11

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