Solve the system of equations using the substitution method. what is x and y
2x + y = 8
y = -x+5

Question

Solve the system of equations using the substitution method. what is x and y 
2x + y = 8 
y = -x+5

anonymous · Answer

answer choices ?

anonymous · Answer

there aren't any

anonymous · Answer

ok Ill do the best I can :D

anonymous · Answer

ok thanks 
! : P

anonymous · Answer

mertsj · Answer

Replace y in the first equation with -x+5 from the second equation.

jamierox4ev3r · Answer

it is explicitly stated that y=-x+5. Therefore, you can plug this in to the other equation to create a big equation. Let me show you what i mean

jamierox4ev3r · Answer

2x+(-x+5)=8

anonymous · Answer

ok i got x=4 and y=1 is that right ?

jamierox4ev3r · Answer

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

jamierox4ev3r · Answer

well, so far i got that x=3

jamierox4ev3r · Answer

rlly all i did was what @Mertsj did

jamierox4ev3r · Answer

then you find the y-variable by plugging in the x value into both equations

anonymous · Answer

ok if you dont mind can you draw it on the drawing bored or in http://www.twiddla.com/

jamierox4ev3r · Answer

y=-3+5
y=2

2(3)+y=8
6+y=8
-6    -6
y=2

jamierox4ev3r · Answer

by plugging the x-value into both equations, we have established that y=2 and x=3

jamierox4ev3r · Answer

but sure i will do it on the drawing board if u want

anonymous · Answer

ok thanks

jamierox4ev3r · Answer

hmm it doesn't work on my laptop can i just draw it on here?

jamierox4ev3r · Answer

@ineedhelp15 ?

anonymous · Answer

ok

jamierox4ev3r · Answer

|dw:1374801278538:dw|

jamierox4ev3r · Answer

ok phew that took a while. does that make sense? @ineedhelp15 ?

anonymous · Answer

yes :) thanks !

jamierox4ev3r · Answer

haha np nice working wit you :)