Question

Encontre r e s, se r-s = -10 e 105/155= r/s

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Answer 1

r-s= -10; r=105s/155; 105s/155-s= -10; 105s-155s= -10; -50s= -10; 5s=1; s=1/5; r-1/5= -10; r=1/5 -10; r=1/5 -50/5; r=-49/5.