91=7+j

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Solution for 91=7+j equation: 



91=7+j

We move all terms to the left:

91-(7+j)=0

We add all the numbers together, and all the variables

-(j+7)+91=0

We get rid of parentheses

-j-7+91=0

We add all the numbers together, and all the variables

-1j+84=0

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

-j=-84

j=-84/-1

j=+84

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