Question

What is the solution to the system of equations
x=3y+5
x-4y=3

Answer 1

1) x=3y +5
subtract 3y from both sides and you will get -3y-x=5
then subtract x from both sides and you will get -3y=-x+5
divide the whole equation by negative three
your answer is \[y=-\frac{ 1 }{ 3 }x+5\]
2) x-4y=3
subtract x from both sides and you will get -4y=-x+3
divide the whole equation by negative four
your answer is \[y=-\frac{ 1 }{ 4 }x+3\]

Answer 2

the answer is an ordered pair though

Answer 3

ohhh ok just a minute

Answer 4

ok

Answer 5

are you there

Answer 6

ya
is it asking you to find either x or y?

Answer 7

both

Answer 8

ok so first you need to get the first equation switched around so it equals a number like the second equation
x=3y+5
subtract 3y from both sides
3y+x=5
x-4y=3 (your second equation)
then you need to first eliminate x by subtracting the two equations

Answer 9

ok so you need to subtract them

Answer 10

how do i do that @Sticky

Answer 11

\[\frac{ x-3y=5 }{ x-4y=3 }=7y=2\]

Answer 12

so y=7

Answer 13

and x=2

Answer 14

no \[y=\frac{ 2 }{ 7 }\]

Answer 15

you had to divide 7y by 7 and 2 divieded by 7 to get y

Answer 16

so y= 3.5

Answer 17

yes now substitute 3.5 as Y in one of the equations to find x

Answer 18

so x=22.5

Answer 19

x=15.5

Answer 20

is that right

Answer 21

@Sticky

Answer 22

I don't think so :/
I'm pretty sure I messed up somewhere you solved it right but there should only be one x just a minute

Answer 23

ok

Answer 24

@Gondola

Answer 25

I think its (-5.5,3.5)

Answer 26

how

Answer 27

ok thank you

Answer 28

bye

Answer 29

http://www.purplemath.com/modules/systlin5.htm
if its wrong you can find out how to do it here sorry for all the trouble :/

Answer 30

thank you so much it help

Answer 31

no probs
cya