2a+2(.5a)=100

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Solution for 2a+2(.5a)=100 equation: 



2a+2(.5a)=100

We move all terms to the left:

2a+2(.5a)-(100)=0

We add all the numbers together, and all the variables

2a+2(+.5a)-100=0

We multiply parentheses

2a+2a-100=0

We add all the numbers together, and all the variables

4a-100=0

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

4a=100

a=100/4

a=25

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