Question

3x+y=2
11x+4y=3

a) x=5,y=3
b) x=5,y=13
c) x=5,y=-13
d) x=-5,y=-13
e) x=2,y=-13

Answer 1

3x+y=2
11x+4y=3

y=2-3x

11x+4(2-3x)=3
11x+8-12x=3
-x=3-8
-x=-5
x=5

y=2-3×5
y=2-15
y=-13