It goes like this:
2x+y=6 and 7x+2y=4
After you solve, they then give you 4 choices for which one has the same answer:
A: 2x+y=6 and 3x-y=10
B: 7x+2y=4 and 6x-2y=10
C: 2x+y=6 and -3x-y=-9
D: 7x+2y=4 and -4x-2y=-12
2x + y = 6
7x + 2y = 4
Multiply the first equation by -2 on both sides
-2(2x + y) = -2*6
-4x - 2y = -12
This represents the same line as first equation.
So the answer is
D: 7x + 2y = 4 and -4x - 2y = -12
What I had actually meant was 'which system has the same *solution* as the first one.
And the answers are x and y.
They include x and y is what I meant.
Yes the equations in option D) have the same solution as the ones in the question as both the system of equations represent the same set of lines.
Oh. I see now. Thanks!
Content will be erased after question is completed.
Enter the email address associated with your account, and we will email you a link to reset your password.
Forgot your password?