Question

At what value of x do the graphs of the equations below intersect?

2x – y = 6

5x + 10y = –10


x=___?

Answer 1

Just took the quiz answer is C.) 2

Explanation:

Answer 2

2x-y=6

simplifying the second equation gives;
x+2y=-2
Multiplying equation II by 2 gives;
2x+4y=-4
2x-y=6
Subtracting the equations;
5y=-10
y=-2
replacing in first equation;
2x+2=6
2x=4
x=2