Question

Please help, will medal and fan :)
Solve the system of equations using the substitution method
x+y=20
y=-5x

Answer 1

@Samus_Aran

Answer 2

I just did this stuff yesterday and I hated it :P

Answer 3

i know, it's horrible! Can you figure it out though, I haven't done it for a while so I forgot :(

Answer 4

umm I can try but idk how much help ill be

Answer 5

are you suppose to find X?

Answer 6

and y

Answer 7

but once x is found it is really easy to find the y

Answer 8

do you go to K12?

Answer 9

hold on I have to refresh

Answer 10

I can give you a link to the K12 book that may help http://k12.kitaboo.com/eBookWs/ebook/maths/maths12/#
and its on the substitution method part.

Answer 11

182 is the page

Answer 12

What does y equal in the equations above?

Answer 13

-5x

Answer 14

thats all i know

Answer 15

Correct. Now we substitute this into the first equation. So it becomes

x+ (-5x) = 20
Now solve for x.

Answer 16

hey better people at math XP

Answer 17

\(x+\color{red}{y}=20\)
\(\color{red}{y}=\color{green}{-5x}\)
therefore
\(x+\color{green}{-5x}=20\)
solve for x.

Answer 18

-4x=20 so x = -5?

Answer 19

Bingo

Answer 20

correct!

Answer 21

alright thanks, now the y

Answer 22

y=25

Answer 23

correct!
y=-5x=-5(-5)=+25=25