SOLUTION: find two numbers whose sum is 21 and the difference is 9

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Question 1139851: find two numbers whose sum is 21 and the difference is 9
Answer by dkppathak(439) About Me  (Show Source):
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find two numbers whose sum is 21 and the difference is 9
let two numbers are x and y
x+y=21
x-y=9
by solving both equation
2x=30
x=15
y=6
both number are 15,6