Question

the difference between 2 no.s is 18.if their sum is 86,what are the no.s ?

Answer 1

Your answer is: 1st no. is 52
                        2nd no. is                                                                            explanation:
                     x - y =18
                     x + y=86
                   ------------------
                     2x  = 104
                      x = 52
                     
we know, x + y = 86  (sub. x value in the equ.)
              52 + y = 86
               y = 86 - 52
               y = 34

Answer 2

Let one number be x.
Then, 
Other number = (86-x)                                                            [Since, 1st no.+2nd no. = 86]
According to question,
1st no. - 2nd no = 18
Thus,
⇒x-(86-x)=18
⇒x-86+x=18
⇒2x-86=18
⇒2x=86+18
⇒2x=104
⇒x=52
Therefore,
The numbers are 52 and 34.


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