Question

Dont understand steps on how to do this problem.
2y-4x=24
x=3y - 1

Answer 1

You have to do the same steps you followed in your last question

Answer 2

2y-4x=24.......(1)
x=3y - 1........(2)

Substitute (2) into (1)
2y-4x=24
2y-4(3y - 1)=24
y=-2
From (2),
x=3y - 1
x=3(-2)-1
x=-7

Answer 3

you already know x = 3y - 1
so substitute it into the other eqution and solve for y

Answer 4

Do what @.Sam. says:)

Answer 5

@jazy and @.Sam. okay thanks, im a little rusty with this lol been awhile.

Answer 6

It all right it took me a while too:) After a time it'll be easier to understand...personal experience lol:)

Answer 7

you can take a look at this vid http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/v/solving-systems-by-substitution-2

Answer 8

perfect ! thanks sam.