3a+8a=91

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Solution for 3a+8a=91 equation: 



3a+8a=91

We move all terms to the left:

3a+8a-(91)=0

We add all the numbers together, and all the variables

11a-91=0

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

11a=91

a=91/11

a=8+3/11

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