Answer:
42 and 21
Step-by-step explanation:
Let x and y be the two numbers
the sum of the two numbers is 63
y+x = 63
The difference between the numbers is 21
x-y= 21
so the two equations are :
[tex]\left \{ {{x+y=63} \atop {x-y=21}} \right.[/tex]
add both equations to eliminate y
x+y+x-y = 63+21
2x =84
x= 42
y= 42-21 = 21
the two numbers are 42 and 21
