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if the same number be added to the numbers 5,11,15and31 the resulting numbers are in propotion. find the number |
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Answer» Answer: Step-by-step explanation: assume number is x (5+x) / (11+x) = (15+x) / (31+x) (5+x) * (31+x) = (15+x) * (11+x) x*x + 5X + 31x + 155 = x*x + 15X + 11X + 165 36x + 155 = 26x + 165 36x - 26x = 165 - 155 10x = 10 x = 1 |
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