Question

ME AJUDEM POR FAVOR. !​

Answer 1

R: d) (8, 12)

x + y = 20

3x + 4y = 72

x = 20 - y

3 (20 - y) + 4y = 72

60 - 3y + 4y = 72

y = 12

x + 12 = 20

x = 8

A = (8, 12)