Question

The difference between two numbers is 18. if their sum is 86 what are the numbers?

Answer 1

Let the first number be x

Sum of the two number = 86

So, ket the second number be 86 - x

Given, their difference = 18



A/q,

86 - x - x = 18

86 - 2x = 18

86 - 18 = 2x

2x = 68

x = $\dfrac{68}{2}$

x = 34



1st number => x => 34

2nd number => 86 - x => 86 - 34 => 52



$\therefore{}$ The numbers are 34 and 52

Answer 2

let the two numbers are X,Y

X-Y=18

X+Y=86

from the first equation , x=18+y.

18+y+y=86

2y=86-18

2y=68

y=68/2

y=34

put this value of y in any of the two equations to get x is equal to 56.

X = 56

Y = 34