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What number must be added to both 100 and 20 so that the sums are in the ratio of 1 to 3?
Wiki User
∙ 12y ago
(100 + x) = 3 (20 + x)
100 + x = 60 + 3x
100 = 60 + 2x
40 = 2x
20 = x
Add 20 to both numbers.
Sums are 120 and 40.
120/40 = 3/1
Wiki User
∙ 12y ago
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