Algebra and FractionsDate: 08/30/97 at 16:20:56 From: Annie Subject: Help me! Please help me with the three questions below. 1) The sum of two-thirds and one-ninth of a number is 28. Find the number N. 2) When two-fifths of the number N is added to one-eighth of a number N, the total is 63. Find the number. 3) The sum of one-third and one-fourth of a number N is 141. What is this number? Date: 08/30/97 at 17:42:31 From: Doctor Anthony Subject: Re: Help me! >1) The sum of two-thirds and one-ninth of a number is 28. > Find the number N. Write the information given as an equation and solve it. (2/3)N + (1/9)N = 28 (7/9)N = 28 28 x 9 N = -------- = 36 7 >2) When two-fifths of the number N is added to one-eighth of > a number N, the total is 63. Find the number. (2/5)N + (1/8)N = 63 (21/40)N = 63 63 x 40 N = --------- = 120 21 >3) The sum of one-third and one-fourth of a number N is 141. > What is this number? (1/3)N + (1/4)N = 141 (7/12)N = 141 This does not give an integer value for N and I suspect you have copied down the question incorrectly, but you can probably work it out for yourself now, using the methods that I have shown you above. -Doctor Anthony, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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