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Given the equation 4x + 2y = 9, which equation below would cause an inconsistent-independent system?

6x + 12y = 13

2x + y = -6

x - 2y = 7

8x - 4y = -5

Question

Fan and medal?
Help me please!

Given the equation 4x + 2y = 9, which equation below would cause an inconsistent-independent system?

 6x + 12y = 13

 2x + y = -6

 x - 2y = 7

 8x - 4y = -5

tkhunny · Answer

Have you considered finding solutions to the various sets?

Inconsistent would have to be similar to the given equation on the left and entirely different on the right.

Here is where we start.
4x + 2y = 9
Notice: x-coeficient is twice the y-coefficient
This eliminates 1 and 3.
Notice: Everything is positive.
This eliminates 4.
Done.