Question

What is the value of the x variable in the solution to the following system of equations?

2x − y = 6
4x − 2y = 12

A. 0

B. 4

C. x can be any number as there are infinitely many solutions to the system.

D.There is no x value as there is no solution to the system.

Answer 1

Have you tried the method I taught you?

Answer 2

Yeah but i got b for this but i didnt think it was right ..

Answer 3

Pick one of the equations and solve for y. Substitute in to the other equation.

Answer 4

Okay, let me see your work, and I'll let you know if it's right.

Answer 5

Actually, let me just explain to you the different things that could happen after that first step and what each thing means.

Answer 6

So I solve for y. I plug into the other equation, and I simplify, solving for x.
My equation could look like:
x=a for some number a. If it looks like this, I have one solution for x, and it is simply a.

It could look something that is always true, but not very interesting like
3=3 or
0=0 or
-1=-1
These kinds of statements are always true, which means that it doesn't matter what x is. There will be a solution for any x.

It could look like a statement that is never true like
1=0 or
-2 = 2 or
10 = 20
This is always false, which means that it doesn't matter what x is, there will be no solutions.

Answer 7

ohhhhhhhhhhhh , thank you soo muchh

Answer 8

My pleasure =D

Answer 9

(: