Your friend asks you to think of two integers, to calculate the sum of the numbers and the difference between the two numbers. You say that the sum is 9 and the difference is 3. Write an explanation of how your friend could calculate your two original numbers.
2006-11-27 01:08:19 · 3 answers · asked by Amarilo55 1 in Science & Mathematics ➔ Mathematics
let a and b be your two integer
we have :
a+b = sum
a-b = diff.
=> a = (sum+diff)/2
b = (sum-diff)/2
in this case
a = 6 , b = 3
2006-11-27 01:12:59 · answer #1 · answered by James Chan 4 · 0⤊ 0⤋
let the integers be x and y
2006-11-27 09:17:00
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answer #2
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answered by riya s 2
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x+y=sum of number you give
x-y=difference of number you give
so, you gave the answer as 9 and 3
x+y=9
x-y=3
______
2x=12
x=6
y=3
so the number is 63
if x
Let m, n be these two integers.
Then
m + n = 9 & (m-n = 3 or n- m = 3).
2006-11-27 09:15:15 · answer #3 · answered by polizei 2 · 0⤊ 0⤋