12a+17a+a=789+111

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Solution for 12a+17a+a=789+111 equation: 



12a+17a+a=789+111

We move all terms to the left:

12a+17a+a-(789+111)=0

We add all the numbers together, and all the variables

12a+17a+a-900=0

We add all the numbers together, and all the variables

30a-900=0

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

30a=900

a=900/30

a=30

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