Question

2x + y = 3
x - 2y = -1

If equation two is multiplied by -2 and then the equations are added, the result is _____.

A.)-3y = 3
B.)3y = 5
C.)5y = 5

Answer 1

please some one help me? ill give a medal..

Answer 2

what did u get if u multiply the second equation with -2?

Answer 3

I don't know how.

Answer 4

never mind, ill try and figure it out on my own, it doesn't matter if I fail. thanks

Answer 5

when the second equation is multiplied with -2 it gives -2x +4y= 2
when we add both equations we get 5y = 5