25+21d=115

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Solution for 25+21d=115 equation: 



25+21d=115

We move all terms to the left:

25+21d-(115)=0

We add all the numbers together, and all the variables

21d-90=0

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

21d=90

d=90/21

d=4+2/7

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