Respuesta :

matthew210mgp0vae0
it is 63 and 21 because 21x3=63
AnimeBrainly
x + y = 84
x = 3y

Plug in 3y for x

(3y) + y = 84
4y = 84
4y/4 = 84/4
y = 21

x = 3y
x = 3(21)
x = 63

x = 63, y = 21

hope this helps

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