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When one-seventh of a number is added to one-fifth of a number the sum is 24 What is the number?
Wiki User
∙ 12y ago
1/7x + 1/5x = 24
Convert 1/7 and 1/5 so that they have a common denominator.
(5/5)1/7x + (7/7)1/5x = 24
5/35x + 7/35x = 24
Add the two fractions.
12/35x = 24
Divide both sides of the equation by 12/35.
(12/35x) /(12/35) = 24/(12/35)
When dividing by a fraction, invert the fraction and multiply instead.
x = 24/(12/35) = 24 x (35/12) = 70
x = 70
Wiki User
∙ 12y ago
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