Question

if the sum of two mumbers is 10 and add difference is 4 then write the numbers

Answer 1

let the number be x and y.

x + y = 10. (1)

x - y = 4. (2)

Adding 1 and 2 ..

x + y + x - y = 14

2x = 14

x = 7Ans.

x + y = 10

7 + y = 10

y = 3Ans.

Answer 2

x+y=10
x-y=4 ........ eq 1
_______
2x=14
x=7

now, by eq 1,
7-y=4
y=7-4
y=3

so the numbers are 7 and 3

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