Question

Q7)solve these (any 5) (3*5=15)
1) The sum of two numbers is 7 and their difference is 21, then find the numbers
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Answer 1

Let the two numbers be x and y.

As per question sum of two numbers is x+y=35......eq(1)

And their difference is x−y=13...................................eq(2)

On Adding equation 1 and 2 we get

                                   x+y=35

                                    x−y=13

                                 ____________

                                     2x=48

                              Therefore x=24

As per equation (1) x+y=35

Putting the value of x we get,24+y=35

                                Therefore y=11

                .............hope it will help u.......