the ratio of the ages of A bad B is 9:4 after 7yrs this ratio becomes 5:3 find their present ages
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Answer:
a 9x b 4x
Step-by-step explanation:
9x/4x+7/7=5/3
3(9x+7)=5(4x+7)
27x+21=20x+35
27x-20x=35-21
7x=14
x=2
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