Let's assume
first number =x
second number =y
sum is 56
[tex] x+y=56 [/tex]
[tex] x-y=10 [/tex]
now, we can solve for x and y
we can add both equations
[tex] x+y+x-y=56+10 [/tex]
[tex] 2x=66 [/tex]
[tex] x=33 [/tex]
now, we can find y
[tex] 33+y=56 [/tex]
[tex] y=23 [/tex]
so, option-A............Answer