Question

y = 5x + 6
y = −x − 7

Answer 1

\[ −x − 7 = 5x + 6\]

Answer 2

solve.

Answer 3

13/-5?

Answer 4

hmmm not sure about the -5 :/ its supposed to be 6 how many solutions are there ?:)

Answer 5

how did you get 6?

Answer 6

5x+x=6x

Answer 7

oh

Answer 8

here's what i did maybe you could tell what im doing wrong

-x - 7 = 5x +6
+ 7 +7
-x = 5x + 13
then i added 5x to -x
-4x = 13

Answer 9

it would be 6x.... the 5 is positive...

Answer 10

we are adding X

Answer 11

but x is negative

Answer 12

ah hah!

Answer 13

you added 5x
you shoulda subtracted

Answer 14

anyways that way is inconvenient

Answer 15

add x to each side; that's easier.

Answer 16

how should i do it?

Answer 17

okay

Answer 18

so -13 / 6x?

Answer 19

but how do i do a fraction on a graph?

Answer 20

it is not -13/6x
the answer is x=-13/6

Answer 21

The graph refers to another way to solve.

Answer 22

Two ways to solve:
1. Equate the two equations and solve for x.
2. Draw the graphs of both equations and see where they hit.

Answer 23

oh i need two lol thanks

Answer 24

wait so how would i do that?

Answer 25

Graph both. It should be simple since they are linear equations.

Answer 26

okay thanks

Answer 27

Sidenote:
If you are wondering how to find y using the first method...
Just plug the calculated x value into the equation of your choice to calculate y.

Answer 28

oh okay thanks