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

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

jack1 · Answer

solve ur original eqn for y
solve each of ur possible solutions in terms of y
which doesnt match?

anonymous · Answer

the second one is the incorrect one

anonymous · Answer

because the second equation should be -14x+28y=-7