brazil-enem 2015 Q163

brazil-enem · Other · enem__day2 Simultaneous equations
QUESTION 163
The solution of the system $$\begin{cases} x + y = 5 \\ 2x - y = 1 \end{cases}$$ is
(A) $x = 1, y = 4$
(B) $x = 2, y = 3$
(C) $x = 3, y = 2$
(D) $x = 4, y = 1$
(E) $x = 5, y = 0$
QUESTION 163

The solution of the system
$$\begin{cases} x + y = 5 \\ 2x - y = 1 \end{cases}$$
is

(A) $x = 1, y = 4$

(B) $x = 2, y = 3$

(C) $x = 3, y = 2$

(D) $x = 4, y = 1$

(E) $x = 5, y = 0$