Question

E3 b) pana la 8 jumate repede pls 60 puncte

Answer 1

b)
x + y - 4 = 0
x - 4 = -y
x + y - y - 4 = 0-y
x = -y + 4
x = x-4+4 = -y+4

y + x - 4 = 0
y - 4 = -x
y + x-x-4 = 0-x
y = -x + 4
y = y-4+4 = -x + 4.