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13r+35/2=-2
We move all terms to the left:
13r+35/2-(-2)=0
We add all the numbers together, and all the variables
13r+2+35/2=0
We multiply all the terms by the denominator
13r*2+35+2*2=0
We add all the numbers together, and all the variables
13r*2+39=0
Wy multiply elements
26r+39=0
We move all terms containing r to the left, all other terms to the right
26r=-39
r=-39/26
r=-1+1/2
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