Answer:
By 2.
Step-by-step explanation:
You need to eliminated the x-terms, so the first step is to focus only in those terms.
So yo have 4x and -2x, since you are thinking in eliminate then you have this equation>
[tex]4-2*K=0[/tex]
Note that we dont put the x variable, since we are studying its coefficients in the equations system.
Solving for K, Gives us that K=2
So.
Multiplying the second equation by 2 results in
[tex]-4x+6y=8[/tex]
When you put them together, it gives you the following
[tex]4x-9y -4x+6y- 7+8[/tex]
and the final equation is
[tex]-3y=15\\[/tex]
giving you the answer for y, that is [tex]y=-5[/tex]
