Question

Solve the equations using graphical method: $x+y=3$ and $-3x+2y=1$

• A. $(1,-2)$
• B. $(-1,2)$
• C. $(1,2)$
• D. $(-1,-2)$

Answer 1

The correct option is C $(1,2)$

For $x+y=3$:

x	0	3	2
y	3	0	1

For $-3x+2y=1$:

x	-1	1	-3
y	-1	2	-4

As the graph shows, both lines intersect at $(1,2)$.