Question

7x - 3y = 4
2x - 4y = 1

Which of the following systems is not the same as solving the system shown?


28x - 12y = 16 and -6x + 12y = -3
14x - 6y = 4 and -14x + 28y = 1
-28x + 12y = -16 and 28x - 56y = 14











i got b

Answer 1

Its b

Answer 2

On this part of the equation
14x - 6y = 4

The 4 is supposed to be 8

Answer 3

And in this equation
-14x + 28y = 1
The 1 is supposed to be 7

Answer 4

-7*

Answer 5

You need to factor everything out of the formula and see if you get the same answer, so:
A) 4*(7x-3y=4) and -3*(2x-4y=1)
B) 2*(7x-3y=2) and 1*(-14+28=1)
C) -4*(7x-3y=4) and 14*(2x - 4y = 1)
Then you can easily see that the answer is B, because there the factored form is not the same as the others.