(3+5)/(5-r)=4

Solution for (3+5)/(5-r)=4 equation:

(3+5)/(5-r)=4

We move all terms to the left:

(3+5)/(5-r)-(4)=0


Domain of the equation: (5-r)!=0

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

-r!=-5

r!=-5/-1

r!=+5

r∈R


We add all the numbers together, and all the variables

8/(-1r+5)-4=0

We multiply all the terms by the denominator


-4*(-1r+5)+8=0

We multiply parentheses

4r-20+8=0

We add all the numbers together, and all the variables

4r-12=0

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

4r=12

r=12/4

r=3