Question

Cateva ex va roggggg

Answer 1

Răspuns:

a. x=10-y

2×10-y=8 =>

20-y=8 => -y=8-20 =>

-y=-12 /×(-1) => y=12 =>

x=10-12 => x=-2

S={(-2, 12)}

b. x=1-y

1-y+2y=-1 =>

1-y=-1 => y=-1-1 => y=-2 =>

x=1-2 => x=-1

S={(-1, -2)}