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.

Answer 1

1) 2x + y = 1
2) 4x + 2y = −2

Answer 2

In equation #1, solve for y.

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

Answer 3

In equation #2, replace the variable y by what you got when you solved for y in equation #1.

4x + 2y = −2

4x + 2*(1 - 2x) = -2

Answer 4

Crank that out and solve for x. @AloneS

Answer 5

ghh im not alones

Answer 6

Pardon me. @AnitaS.

Crank that out and solve for x.

4x + 2*(1 - 2x) = -2

Answer 7

ok I get 2=-2

Answer 8

I got 0 = -4.

There is no solution for this pair of equations.

Hold on while I draw the graphs. I think that the lines are parallel.

Answer 9

i got no solution too

Answer 10

yeah when you solve a system of equations and you end up with different number's on opposite sides of the equal sine that means no solution exists.

for example 2 = 3

Answer 11

sign***

Answer 12

Because the lines are parallel, they do not intersect and there is no common solution. @AnitaS.

Answer 13

That is a wrap.

Answer 14

So the answer is C right?

Answer 15

ty! ;)

Answer 16

If this is C, then yes.

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