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Should the question read: "In math, a over 5 equals b over 7 equals 8 over 3. Does a plus b equal 31.99?"
Do you mean a/5 = b/7 = 8/3?
If so, we can look at a and b separately.
a/5 = 8/3
a = 5*(8/3)
a = 40/3
a = 13.33
b/5 = 8/3
b = 7*(8/3)
b = 56/3
b = 18.67
It looks as though you have added a and b together to get 13.33 + 18.67 = 32 (if you did b=18.66 then you would get 31.99 but it should be 32).
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∙ 2010-04-04 20:32:59
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