7a+4a=165

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Solution for 7a+4a=165 equation: 



7a+4a=165

We move all terms to the left:

7a+4a-(165)=0

We add all the numbers together, and all the variables

11a-165=0

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

11a=165

a=165/11

a=15

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