/biz/ - Business & Finance

[Anonymous No.15781234]

i dont get it

[Anonymous No.15781282]

>>15781234
/sci/

sage this

how appropriate, that bday hat looks like a dunce cap

[Anonymous No.15781322]

-2x-3y = 35 becomes 10x+15y=-175 (*-5)
5x-8y=52 becomes 10x-16y=104 (*2)

-16y+15y=104+-175
-y=-71
y=71

with this you can calculate x
even though this doesn't belong here i was bored so here you go

[Anonymous No.15781341]

>>15781322
shhhh. stop. can't you see you're doing his homework?

[Anonymous No.15781364]

>>15781341
i know i am, and there was a mistake in my calculations anyway, so op can have a good old time either searching for the mistake or calculate it himself

[Anonymous No.15781365]

>>15781322
the right answer is apparently (-4,-9)

[Anonymous No.15781380]

>>15781234
plug it into a calculator you dumb fuck
or equate the equations and separate x and y

[Anonymous No.15781436]

Reported for underage.

[Anonymous No.15781451]

You can use a whole bunch of Methods to solve systems of equations with two variables. It’s really not that hard, fucking google it.

Consider KYS.

[Anonymous No.15781619]

>>15781322
kek, it's wrong

[Anonymous No.15781653]

>>15781234
8*(-2x - 3y = 35) --> -16x -24y = 280
3*(5x - 8y = 52) --> 15x - 24y = 156
15x - 24y + 124 = 280
15x - 24y + 124 = -16x - 24y
15x + 124 = -16x
31x + 124 = 0
31x = -124
x = -4

[Anonymous No.15781689]

>>15781619
Answer:
x = -4
y = -9

-8y = 52 - 5x
y = (52 - 5x) / -8
y = 52/-8 - 5x/-8
y = -6,5 + 0,625x

-2x - 3 * (-6,5 + 0,625x) = 35
-2x + 19,5 - 1,875x = 35
-3,875x + 19,5 = 35
-3,875x = 35 - 19,5
-3,875x = 15,5
x = 15.5 / -3,875
x = -4

-2 * (-4) -3y = 35
8 - 3y = 35
-3y = 35 -8
y = 27/-3
y = -9

[Anonymous No.15781705]

Lol I took honors linalg in uni and I forget all this shit. If I need to reduce a matrix I just call a method. The better you become at math the worse you become at doing it by hand.

[Anonymous No.15781755]

let b = a
a^2 = b*a
a^2 - b^2 = b*a - b^2
(a+b)*(a-b) = b(a-b)
( (a+b)*(a-b) / (a-b) ) = ( b(a-b) / (a-b) )
a+b = b
b+b = b
2b = b


also math is bullshit
https://www.vice.com/en_us/article/8xwm54/number-theorist-fears-all-published-math-is-wrong-actually

[Anonymous No.15781801]

>>15781755
you can't divide by 0, silly

[Anonymous No.15781827]

Imagine taking the time to solve such a simple problem for some retarded anon

>>15781705

>honors in linalg in uni
>can't solve a fucking 2x2 instantly when looking at it

you probably went to mcburgers kentucky uni or some shit

[Anonymous No.15781850]

>>15781755
>vice

[Anonymous No.15781928]

>>15781850
>muh vice
>being incapable of looking at information from people you may not agree with
I'll DM Anglin and he can put it on the Stormer, maybe then you'll read it

"Buzzard’s point is that modern mathematics has become overdependent on the word of the elders because results have become so complex. A new proof might cite 20 other papers, and just one of those 20 might involve 1,000 pages of dense reasoning. If a respected senior mathematician cites the 1,000 page paper, or otherwise builds off it, then many other mathematicians might just assume that the 1,000-page paper (and the new proof) is true and won't go through the trouble of checking it. But mathematics is supposed to be universally provable, not contingent on a handful of experts."

[Anonymous No.15782182]

>>15781928
Doesn't mean math is bullshit.
Your claim>>15781755
>also math is bullshit