Answer :
[tex]x-\ first\ number\\ y- \ second \ number\\\\
x=y+28\\\\
x+y=420\\\\
y+28+y=420\\\\
2x+28=420\ \ \ | subtract\ 28\\\\
2x=392\ \ \ | divide\ by\ 2\\\\
x=196\\\\
y=420-196=224\\\\
Two\ numbers:\ 224\ and\ 196.[/tex]
let x= first number
x+280= second number
2x+28= 420
2x= 392
x= 196
196+28=224