15/7=25/21-d

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Solution for 15/7=25/21-d equation: 



15/7=25/21-d

We move all terms to the left:

15/7-(25/21-d)=0



Domain of the equation: 21-d)!=0

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

-d)!=-21

d!=-21/1

d!=-21

d∈R



We add all the numbers together, and all the variables

-(-1d+25/21)+15/7=0

We get rid of parentheses

1d-25/21+15/7=0

We calculate fractions

There is no solution for this equation

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