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-7/4+r=-3
We move all terms to the left:
-7/4+r-(-3)=0
We add all the numbers together, and all the variables
r+3-7/4=0
We multiply all the terms by the denominator
r*4-7+3*4=0
We add all the numbers together, and all the variables
r*4+5=0
Wy multiply elements
4r+5=0
We move all terms containing r to the left, all other terms to the right
4r=-5
r=-5/4
r=-1+1/4
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