Question

Help! I'm stuck
Solve the system using the elimination method.
2x + 3y = 5
8y = x + 26

Answer 1

@thomaster

Answer 2

@e.mccormick

Answer 3

@austinL @satellite73

Answer 4

easy

Answer 5

I found the x point first. It was -3.8.

Answer 6

but then I tried to plug it back into the 2nd equation and it didn't work out

Answer 7

I'll copy paste my work

Answer 8

ok

Answer 9

First you have to line up the x’s and y’s.

2x+3=5
-x+8y=26

You have to make either the x’s or the y’s cancel out. Looking at our problem, it would be easier to do the x’s. We could multiply 2 to the 2nd equation so that it becomes -2. Then we can cancel 2x and -2x.
2x + 3y = 5
2(-x+8y= 26) --> -2x-16y=52
2x and -2x cancels out. Simplify the rest.
2x + 3y = 5
-2x-16y=52
________
-13y= 50
Y= -3.8

Now we plug the y value into any equation to get the x value.

Answer 10

this is where you got stuck

Answer 11

yes

Answer 12

@hba

Answer 13

when i tried to plug it back into the 2nd equation to find the x value.

Answer 14

is everything i did correct?

Answer 15

ok so if it works for one it should work for the other so lets try a different number

Answer 16

this is when I tried to plug it back in:
-x+8y=26
-(-3.8)+8(-3.8) = 26
3.8 + 30.4 = 26
34.2 = 26

Answer 17

ok. so solve for x first instead of y?

Answer 18

yes

Answer 19

@mathmale

Answer 20

ok

Answer 21

can u write it out for me I kinda have to be somewhere soon

Answer 22

ok

Answer 23

try 3.2

Answer 24

to plug in?

Answer 25

yes

Answer 26

or 3.5

Answer 27

ohh, i know my mistake, i plugged in the -3.8 for x AND y in the 2nd equation, when i was supposed to only plug it in for y. let me see if it works.

Answer 28

i got 56.4 for x. is that too big?

Answer 29

try anything below 3.8

Answer 30

why

Answer 31

and then you will get you answer ooo i got somebody who can help

Answer 32

I got -3.8 because 50 divided by -13 is -3.8

Answer 33

ok

Answer 34

look! http://www.algebra.com/algebra/college/linear/solving-linear-system-by-elimination.solver where it got worked out

Answer 35

oh darn it, another person can't see it

Answer 36

i can see it wht grade are you in+

Answer 37

look at the screenshot

Answer 38

2nd page.

Answer 39

so the answer is (-2, 3)

Answer 40

yes and your grade

Answer 41

huh?