Mathematics
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OpenStudy (anonymous):
medal and fan please help!!!!!!!!!!!!!
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OpenStudy (solomonzelman):
no need for medal and fan, just ask a particular question.....
OpenStudy (anonymous):
A system of equations is shown below:
3x – y = 2
x + y = 6
The x-coordinate of the solution to this system of equations is
OpenStudy (solomonzelman):
I will rejoin to remove question marks
OpenStudy (anonymous):
its a fill in the blank
OpenStudy (solomonzelman):
so you just need to solve for x.
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OpenStudy (anonymous):
Thats the problem I dont know how to do that
OpenStudy (anonymous):
its ok I can read them I just pretend their not there
OpenStudy (anonymous):
u there
OpenStudy (solomonzelman):
you have this system below:
\(\large\color{royalblue}{ 3x - y = 2 }\)
\(\large\color{royalblue}{ x + y = 6 }\)
OpenStudy (solomonzelman):
add the equations together
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OpenStudy (anonymous):
wat do u mean
OpenStudy (anonymous):
is it 4x+2y=8?
OpenStudy (solomonzelman):
\(\large\color{royalblue}{~~~~~~3x ~- ~y ~~= 2 }\)
\(\large\color{royalblue}{^{^{\color{red}{\Huge+}}} ~~x ~~+ ~y~~ = ~6 }\)
\(\large\color{royalblue}{^\text{_________________} }\)
OpenStudy (solomonzelman):
add the x's, the y's and the numbers (2 and 6)
OpenStudy (anonymous):
is it 4x+2y=8?
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OpenStudy (solomonzelman):
-y+y = 2y? are you sure?
OpenStudy (anonymous):
oh forgot I didnt see the negative its just y now right so it would be
4x+y=8?
OpenStudy (solomonzelman):
no not exactly.
OpenStudy (solomonzelman):
(your 4x and the 8 are correct)
OpenStudy (anonymous):
4x=8?
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OpenStudy (solomonzelman):
yup, the y cancel
OpenStudy (anonymous):
ok so x=2?
OpenStudy (solomonzelman):
\(\large\color{royalblue}{4x=8 }\) , so \(\large\color{royalblue}{x=2 }\). CORRECT!
OpenStudy (solomonzelman):
So, the x-coordinate of your solution is 2.
OpenStudy (anonymous):
and thats it?
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OpenStudy (solomonzelman):
yes, you are done with this question:)
OpenStudy (anonymous):
heres your medal and I'll mention you in another question if I need help