Question

Solve the system of equations. Show your work.

x + 2y = 5
3x + 2y = 17

im still beyond confused... :l

Answer 1

lol no u will show me ur work :P ok lets use the substitution method, familiar with that one?

Answer 2

Yea

Answer 3

cool can u do that now then? or would u like me to start u off?

Answer 4

i can probably do it now.. thanks

Answer 5

What you have to do is just eliminate the "y" just by subtracting those two equations.

Answer 6

if u want u can show us ur working and we will correct it or show us ur answers and we will confirm them :)

Answer 7

lol, that's a better idea @HawkCrimson

Answer 8

the answer i got for the first equation is y = 2.5 + -0.5x

Answer 9

Im still new at this

Answer 10

that's right

Answer 11

ok and y = 8.5 + -1.5x is what i got for the second one

Answer 12

umm u want to have exact answers for y and x

Answer 13

yep that's right

Answer 14

like y = 5 and x=3

Answer 15

so wat u did didnt answer the question.. so u know how to solve for y and x?

Answer 16

it's still the same, but yeah you should put it as \[\frac{ 5 }{ 2 }\]and all the rest in fractions

Answer 17

Divide both sides by two. right?

Answer 18

yes @mirandabell902

Answer 19

ok

Answer 20

y = 5/2 for the first and y = 5/8 for the second one, right?

Answer 21

both of them r supposed to have the same y and x value

Answer 22

ok ill do it with u cause idk wat u were doing before and i dont know how u got those two equations but ill show u how to do it by substitution :)

Answer 23

first take the 1st equation x + 2y = 5 and make y or x the subject of the formula (it doesnt matter)

Answer 24

okay

Answer 25

wat did u get?

Answer 26

y=5

Answer 27

calm down, one step ata time and i didnt get that.. just rearrange the formula for me and show me how it looks with x or y being the subject of the formula.

Answer 28

y=2+5

Answer 29

x + 2y = 5
x = 5 - 2y or
y = (5-x)/2
that is wat i wanted, understand?

Answer 30

yes

Answer 31

so choose any one lol

Answer 32

x = 5 - 2y

Answer 33

The easiest way is just subtract. that way, it cancels 2y in the first equation and 2y in the secnd equation. then, you'll get the x

Answer 34

yea..nice to know @Lynncake .. as i was saying @mirandabell902 :P

Answer 35

\[-\left(\begin{matrix}x+2y=1 \\ 2x+2y=1\end{matrix}\right)\]\[-x=0 \rightarrow x=0\]

Answer 36

or u can interupt me again...sure.

Answer 37

:D sorry, ok go on

Answer 38

lol even im confused now D:

Answer 39

eh just show her the subtraction method lol

Answer 40

but we should be confusing her with showing her two methods at the same time lol

Answer 41

yeah you're right, but just finish yours :D @HawkCrimson

Answer 42

i have to go bye. u do the rest and plus she isnt even replying..