Question

Solve the system.
y = -3x + 5 and y = 2x + 5


(0, 5)

(5, 0)

(-5/2, 0)

no solution

infinitely many solutions

Answer 1

(0,5)

Answer 2

if y = -3x + 5
and y = 2x + 5

so,
\[\huge -3x+5=2x+5\]
solve for x??

Answer 3

@charlieberzak

Answer 4

yup im here

Answer 5

solve for x

Answer 6

im thinking :P

Answer 7

2x = 7x??/ something like that?

Answer 8

no!!

Answer 9

i dont get it

Answer 10

Use the substitution method.

Answer 11

\[\huge -3x+5=2x+5\]
\[\huge -3x-2x=5-5\]
\[\huge -5x=0\]
\[\huge x=0\]

Answer 12

lol.

Answer 13

now put x=0 in \(\large y=2x+5/-3x+5\)

Answer 14

my head is starting to hurt :/ but i think im getting it

Answer 15

by the "/"he means "or"

Answer 16

@Jhannybean please don't give direct answers....its not our OS CoC

Answer 17

let @charlieberzak to solve it..only we can give hints to helper

Answer 18

@charlieberzak can you solve it???

Answer 19

i have a similar question, i can try to solve it with ur help

Answer 20

Solve the system.
y = 4x + 12 and y = -2x + 6
Answer

(0, 3)

(-1, 8)

(12, 6)

no solution

infinitely many solutions

Answer 21

ok, @charlie you see the y=-3x +5? and then the other equation y=2x+5?

substitute the first equation for the "y"" in the second equation, can you tell me what you get?

Answer 22

charlie, we saw that y = those 2 equations right,
y = -3x + 5 and y = 2x + 5
and -3x+5=2x+5
when we solve this we got a value for x
saying at this x value these 2 equations are equal, but this doesnt exactly tell us at what y value, is it at with this x value

Answer 23

Ok.. for this one substitute the 4x+12 for the "y" in the other equation. what do you get?

Answer 24

@charlieberzak there is very crowd..... @Jhannybean give hint and then solve

Answer 25

if you think about these 2 equations
y = -3x + 5 and y = 2x + 5
they are 2 equations of a line, and they will intersect at a point if they are not parallel, so we need to find which point they intersect at