2(a-17)+a=86

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Solution for 2(a-17)+a=86 equation: 



2(a-17)+a=86

We move all terms to the left:

2(a-17)+a-(86)=0

We add all the numbers together, and all the variables

a+2(a-17)-86=0

We multiply parentheses

a+2a-34-86=0

We add all the numbers together, and all the variables

3a-120=0

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

3a=120

a=120/3

a=40

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