a-25+2a=131

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Solution for a-25+2a=131 equation: 



a-25+2a=131

We move all terms to the left:

a-25+2a-(131)=0

We add all the numbers together, and all the variables

3a-156=0

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

3a=156

a=156/3

a=52

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