Mathematics
23 Online
OpenStudy (gokuporter):
http://prntscr.com/98gr7s
Join the QuestionCove community and study together with friends!
Sign Up
pooja195 (pooja195):
Use the elmination method
pooja195 (pooja195):
Or substituion whatever u like
OpenStudy (gokuporter):
How do you do the elimination method
pooja195 (pooja195):
Ok let's stick with substituion :P
We need to solve equation 1 for x
pooja195 (pooja195):
x+y=5
isolate x
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gokuporter):
Okay
pooja195 (pooja195):
Do you know how?
OpenStudy (mathmale):
Hint: what's the mathematical opposite of addition?
OpenStudy (gokuporter):
Subtractioon
pooja195 (pooja195):
Good subtract y from both sides
Join the QuestionCove community and study together with friends!
Sign Up
pooja195 (pooja195):
You get x=-y+5
pooja195 (pooja195):
Equation 1= x=-y+5
Equation 2= x-2y=2
pooja195 (pooja195):
We know the value of x already so just plug it into equation 2
-y+5-2y=2
solve for y
pooja195 (pooja195):
i need to go so @sleepyjess or @TheSmartOne will take over :)
OpenStudy (gokuporter):
What's the value of x?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (sleepyjess):
Equation 1= x=-y+5
OpenStudy (gokuporter):
Okay, how do I solve it?
OpenStudy (sleepyjess):
substitute that in for x in the second equation
OpenStudy (gokuporter):
How do I do that?
OpenStudy (sleepyjess):
Just put it in instead of x...
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gokuporter):
Y= y-2y=2
OpenStudy (sleepyjess):
-y+5-2y=2
OpenStudy (gokuporter):
Now what?
OpenStudy (sleepyjess):
Solve for y
OpenStudy (sleepyjess):
combine like terms on the left side
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gokuporter):
3y?
OpenStudy (sleepyjess):
-
OpenStudy (gokuporter):
0y
OpenStudy (sleepyjess):
5-3y=2
OpenStudy (gokuporter):
2y?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (gokuporter):
.-.
OpenStudy (sleepyjess):
move the 5 over
OpenStudy (gokuporter):
Over what?
OpenStudy (sleepyjess):
to the other side
OpenStudy (gokuporter):
3y-5=2
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (sleepyjess):
5-3y, how do we get the 5 to the right side?
OpenStudy (sleepyjess):
5-3y=2
OpenStudy (gokuporter):
.-. You wrote that before.
OpenStudy (gokuporter):
|dw:1448835536624:dw|