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x-y=16

x=4y-5

x-y=16

x-4y=-5

(x-y=16)-1

-x+y=-16

x-4y=-5

(you're gonna add these together)

-3y+-21

y=7

then plug it into the equation: x-y=16

x-1(7)=16

x-7=16

x=23

so your numbers are (23,7)

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