SOLUTION: If one fourth of a certain number is added to one fifth of the same number, the result equals the sum of 13 and one eighth of the number. Find the number.
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Question 111381: If one fourth of a certain number is added to one fifth of the same number, the result equals the sum of 13 and one eighth of the number. Find the number.
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
let x be the number.
x/4 + x/5 = 13 + x/8
10x+8x=520+5x Multiply 40 by both sides to eliminate fractions.
18x-5x=520+5x-5x
13x=520
13x/13=520/13
x=40
Always check:
40/4 + 40/5 = 13 + 40/8 true
Ed
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