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Mathematics, 01.09.2021 15:10 hackman1216

Bob and rob in ratio 3:4 and their age 4 years ago was 5:7 find their ages please answer (asap)
thnx pls do in one variable

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Bob and rob in ratio 3:4 and their age 4 years ago was 5:7 find their ages please answer (asap)
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