a number is added to one third of itself equal to 12. find the number.
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Let the number be x
x+1/3x=12
(3x+1x)/3=12
4x=12*3
x=36/4
x=9
.: The number is 9
x+1/3x=12
(3x+1x)/3=12
4x=12*3
x=36/4
x=9
.: The number is 9
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