2(40+a)=142

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Solution for 2(40+a)=142 equation: 



2(40+a)=142

We move all terms to the left:

2(40+a)-(142)=0

We add all the numbers together, and all the variables

2(a+40)-142=0

We multiply parentheses

2a+80-142=0

We add all the numbers together, and all the variables

2a-62=0

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

2a=62

a=62/2

a=31

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