Question

need help....
What is the solution of the system? Use substitution. y = x + 6 y = 2x

Answer 1

Both equations are equal to y, so you can substitute one in for the other. What does the new equation look like (hint: there won't be any y in it)?

Answer 2

(6, 12)
(–12, –6)
(–6, –12)
(2, 4)
its one of these..

Answer 3

Are you looking for an answer, or how to do it? Since both are equal to y, you can set the two equations equal to each other, then solve for x.

Answer 4

even if you can't do the algebra, do you know what it means to be a solution of a system?

Answer 5

no

Answer 6

It means "what value(s) of x and y work so that both equations are true?"

Answer 7

please show me step by step

Answer 8

y = x + 6
y = 2x

Substitution says if y is one thing, and y is another thing, then those two things must be equal to each other. If Bob is Mr. Smith, and Bob is also called "Skippy", then Mr. Smith must be Skippy.

So you can say x + 6 must be equal to 2x. Now try solving for x.

Answer 9

is it (6,12)

Answer 10

Are you guessing or did you actually get that answer? :)

Answer 11

i got it! ha

Answer 12

Then good job! Because it's right.