Question

What is the solution of the following system?
-2x-y=1
-4x-2y=-1

Answer 1

Multiply the first equation by 2, then subtract the second equation. What do you get?

Answer 2

i got -4x-2y=2 but then how do you subtract the second equation?

Answer 3

i got 1

Answer 4

No, you should get 0=3

Answer 5

how is that? would you please explain

Answer 6

LHS should be -4x-2y-(-4x-2y)

Answer 7

that is 0 then 2-1

Answer 8

RHS should be 2-(-1) =3

Answer 9

ohh okay then i just substitute the 3 in to find y?

Answer 10

No, since 0 can never be equal to 3, there is NO solution to the set of equations.

Answer 11

Thank you! i was confused.

Answer 12

Welcomed