Question 648866
Let two numbers be 'x' and 'y'
Given:Sum of the numbers, x+y=45   .....(1)
Difference of the numbers,x-y=11   .....(2)
We have to cancel any one variable, if we add the equations'y' will get cancelled
 x+y=45
 x-y=11
2x=56
 x=56/2
 x=28    ...(3)
Substitute the value of x in say equation 1
 x+y=45
28+y=45
 y=45-28
 y=17