4a+7a=77

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Solution for 4a+7a=77 equation: 



4a+7a=77

We move all terms to the left:

4a+7a-(77)=0

We add all the numbers together, and all the variables

11a-77=0

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

11a=77

a=77/11

a=7

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