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Answer:
c
Step-by-step explanation:
x = 5
3:5
5a + 3b = 6b
5a=6b-3b
5a=3b
a/b= 3/5
a:b=3:5
35
If they won 4/5 then they lost 1/5. If 1/5 is 7 then you need five 7s.
7 × 5 = 35