1.

Find two numbers who’s sum is 75 and difference is 15 .

Answer»

Let the two nos be x and y (x>y)

given

x+y=75 ....(1)
x-y=15 ....(2)

adding 1 and 2

2x= 90
x= 45

x+y=75 .... (from 1)
45+y= 75
y= 75-45
y= 30



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