Question

preciso rapido dessa resposta

Answer 1

c x=3 e y=5
d x=4 y=3
e x=2 y=2 e

Answer 2

x + y= 4
x + 2y= 6

x = -y + 4

-y + 4 + 2y = 6
y = 6 - 4
y = 2

x + 2 = 4
x = 4 - 2
x = 2

x - y = 2 - 2 = 0