91=87+28/q

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Solution for 91=87+28/q equation: 



91=87+28/q

We move all terms to the left:

91-(87+28/q)=0



Domain of the equation: q)!=0

q!=0/1

q!=0

q∈R



We add all the numbers together, and all the variables

-(28/q+87)+91=0

We get rid of parentheses

-28/q-87+91=0

We multiply all the terms by the denominator


-87*q+91*q-28=0

We add all the numbers together, and all the variables

4q-28=0

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

4q=28

q=28/4

q=7

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