Solve the system of equations by substitution. What is the solution for x?

2x + y = 1
4x + 2y = -2

x = 0

x = 2

There is no x value, as there is no solution.

x can be any value as, there is an infinite number of solutions.

Question

Solve the system of equations by substitution. What is the solution for x?

2x + y = 1
4x + 2y = -2

 x = 0

 x = 2

 There is no x value, as there is no solution.

 x can be any value as, there is an infinite number of solutions.

anonymous · Answer

how does one solve this this

anonymous · Answer

2x + y = 1
y=1-2x
put above value of y in other equation(4x + 2y = -2)
4x+2(1-2x)=-2
4x+2-4x=-2

2=-2 
 0_0
so no solution

igreen · Answer

Solve the first equation for $y$:

$2x + y = 1$
$y = -2x + 1$

Now we can plug in $-2x + 1$ into the 2nd equation to get our $y$ value.

$4x + 2y = -2$
$4x + 2(-2x + 1) = -2$
$4x - 4x + 2 = -2$
$0 + 2 = -2$

The x-value cancels themselves out.

There is no solution.

igreen · Answer

The lines are parallel so the answer is C.

anonymous · Answer

oh ok but at first i thought it would be D but i get y its not

igreen · Answer

Well if it had infinitely many solutions both line A and line B would be the same..but they are not..they're parallel, they don't cross.

anonymous · Answer

oh ok and gee you would make a good teacher i have to say

igreen · Answer

Lol, I'm only 13..

anonymous · Answer

lol im 15 haha i fell stupid