Question

If you wanted to eliminate the x variable by adding the two equations in the following system, what could be your first step? 2x − y = 6 4x − 4y = 10

Answer 1

Multiply the first equation by -2 to get -4x so when you add them up, you cancel the xs.

Answer 2

so i would get Multiply the first equation by –2. @alrightatmaths

Answer 3

If you specifically have to add the two together to cancel out x, yes because you'd have -4x in the first equation and 4x in the second. Adding those together gives 0.