SOLUTION: The sum of three-fifths of a number and one-fourth of the number is68. What is the number

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Question 973440: The sum of three-fifths of a number and one-fourth of the number is68. What is the number
Answer by Boreal(15235) About Me  (Show Source):
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number is x
(3/5)x +(1/4)x =68
(3/5) +(1/4) have a common denominator of 20
(12/20)+(5/20)=17/20
Therefore, (17/20)x=68
Multiply both sides by 20
17x=1360
divide both sides by 17
x=80 ANSWER
(3/5)80=48
(1/4) 80=20
sum is 68