Mathematics
23 Online
OpenStudy (anonymous):
What is the solution to the system of equations? x+y=5 x-2y=2 ( , )
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Vocaloid (vocaloid):
hint: start by subtracting the two equations
Vocaloid (vocaloid):
what is x - x ?
OpenStudy (anonymous):
Wait how would I do that
Vocaloid (vocaloid):
start with x
take away x
what's left?
OpenStudy (anonymous):
nothing
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Vocaloid (vocaloid):
good, so x - x = 0
Vocaloid (vocaloid):
now what is y - (-2y)?
OpenStudy (anonymous):
so I would have to do the parentheses first?
OpenStudy (anonymous):
How I still have to figure out Y
Vocaloid (vocaloid):
you don't, you just leave y as it is
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Vocaloid (vocaloid):
hint:
1-(-2) = 1 + 2
y-(-2y) = ______
fill in the blank
OpenStudy (anonymous):
It's confusing
Vocaloid (vocaloid):
y-(-2y) = y + 2y = ?
Vocaloid (vocaloid):
I start with y
then I add two more y's
how many y's do I have?
OpenStudy (anonymous):
3
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Vocaloid (vocaloid):
good
so
y + 2y = 3y
OpenStudy (anonymous):
ohh lol I suck at math
Vocaloid (vocaloid):
then we finish subtracting
5 - 2 = 3
that gives us
3y = 3
so what does y equal?
OpenStudy (anonymous):
1
Vocaloid (vocaloid):
good
now, we know that y = 1
so if x + y = 5, what does x equal?
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OpenStudy (anonymous):
4
Vocaloid (vocaloid):
good so our answer is
(4,1)
OpenStudy (anonymous):
Omg Thank You so much!!