Question

use substitution
y=2x+3
y=3x+1

Answer 1

let y=2x+3 be equation 1. Okay? Now, substition means, that the value of y in equation 1 is same for equation 2?

Answer 2

@Jessii I believe I have you on this?

Answer 3

yeah. would you multiply the 2 and 3 with a number that they both equal to? like 3 * 2=6
and 2*3=6 but make one of them negative

Answer 4

No no, we're doing it by substitution. Don't jump steps here. Trust me. =)

A yes no at my first question.

Answer 5

y=2x+3 is the value of y which is also valid for y=3x+1

Basically these equations represent lines. The solution will be a point where these lines would interesct.

Answer 6

intersect*

Answer 7

okay

Answer 8

So, since y is same for both, I can say that 2x+3=3x+1
Right?

Answer 9

The idea is that two lines intersect at a point, the point is same for both the lines.

Answer 10

so, i'd subtract 2x from 3x
then it would be 1x=3?

Answer 11

or would i add 2x and 3x
5x=3

Answer 12

No. See, let's take that step by step too.
Subtract 2x from both sides of the equation, that is:-
3=x+1
Subract 1 from both sides of equation that is:-
2=x

Answer 13

Putting this value of x in both the equations would give you a value of y. I hope this is clear.