𝟐𝒙 + 𝒚 = 𝟑
−𝟓𝒙 − 𝟐𝒚 = 𝟒
What does x equal? And why isn't it -10?
𝟐𝒙 + 𝒚 = 𝟑
Anthony Foster
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Ryan Reed
Because you fucked up a negative sign. And something else too.
David Anderson
it is tho
Angel Roberts
2x+y=3
y=3-2x
-5x-2y=4
-5x-(2(3-2x))=4
-5x-6+4x=4
-x=10
x=-10
y=3-2x
y=3-(2(-10))
y=23
You're right
John Gutierrez
B-but it was marked wrong, somehow it's a positive 10.
Alexander Jenkins
Were da mafamatichins at
John Parker
but no tho, its -10
Daniel Jenkins
BUT I WAS MARKED WRONG SO I MUST BE WRONG
Sebastian Taylor
y = -2x+3
-5x-2(-2x+3) = 4
-5x+4x-6 = 4
-x-6 = 4
-x = 10
x = -10
It is, though.
Camden Long
BUT NO THO
its -10
Asher Bell
...
Joseph Scott
You think teachers never fuck up when grading?
How about the textbook? Every now and then we'd find an incorrect answer listed in the back of a math book.
Brayden King
but no tho
Daniel Nelson
>we'd
fuck off teacher boy
Isaac Scott
...
Ayden Long
we = other students and myself.
Angel Hall
NO.
2(10)+y = 3
y = -17
-5x-2(-17) = 4
-5x+34 = 4
-5x = -30
5x = 30
x = 6
6 ≠ 10
Adam Williams
I hope you faggots realize that you are arguing against a math book written by a professional mathematician with a phd and 200+ IQ.
Do you feel retarded yet?
Julian Lewis
but no tho
its -10
Ayden Bell
ANY HELP ON THIS ONE? I MUST BE WRONG HERETOO THEN I PUT A
Owen Powell
...
Lucas Reed
I'm proving him wrong, boy;
x has to be -10, otherwise the equations make no sense.
Charles Lee
but its A tho
Joseph Nguyen
5x = z+7y
x = (z+7y)/5
The fuck?
Justin Thomas
lmao I'm only on ELEMENTARY MATH PLACEMENT PRACTICE FOR CUNY
I can't wait to see how the college level math will look like.
www2.cuny.edu
For anyone who wants proof, this is why you don't go to school in NY
Adam Wood
x = [ (z + y)(z - y) + 2 ] / 5
Dylan Allen
2(-10)+y=3
solve non-variable portions
-20+y=3
+20
y=23
-5(-10)-2y=4
solve nonvariable
50-2y=4
-50
-2y=-46
divide by -2
y=-23
-10 seems to be a valid solution to me
argue it to your professor
provide mathematical proof
although, without doing the math, it seems that 10 is a valid solution as well
so you might get partial credit for only selecting one of the available correct solutions
Oliver Green
nevermind
forgot to change the sign on that last division
-46/-2=23
23=/=-23
-10 is not a valid solution
Nathan Ramirez
reread your shit 23=23
Ayden Reed
( 4x + 2y = 6)
+(-5x - 2y = 4)
(-x = 10), (x = -10)
-20 + y = 3 (y = 23)
50 - 46 = 4
(-10 , 23)
Zachary Bell
Where the fuck did you get -23?
Henry Smith
itt: cavemen baffled my high school math
Grayson Jones
>not reading
>2016
ok
Andrew Sanchez
it's this. either (s)he fucked up or the book the answer was pulled from is.
for once, this isn't trolling. it's seriously -10.