Question

Let x ∈ Z. Prove that if 5x - 7 is odd, then 9x + 2 is even. @satellite73 @ganeshie8 @myininaya @UnkleRhaukus @RadEn @robtobey @chmvijay @Luigi0210 @eliassaab @genius12 @Vincent-Lyon.Fr @Preetha @Kainui @ehuman @wolfe8 @lucaz @INeedHelpPlease? @khadeeja @thadyoung @A_clan @tester97 @Andras @Confusionist @linh412986 @BlackLabel @leozap1 @JMark @Microrobot @zacharyf @Rubio101 @NaomiBell1997 @MeganEdward @theballer225 @link,zoro @Goldenmoon @CrayolaCrayon_ @Cutefriendzoned @coffeeismylife @christopher_miller420 @soumyamohan @zubhanwc3 @Ahmed47 @becca9898 @Marharg10 @kels428 @haunting_beauty @kauf

Answer 1

Everyone's sleeping and I feel alone ;-;

Answer 2

5x-7 is odd
=>
5x-7 = 1 (mod 2)
x = 0 (mod 2) -----------(1)

Answer 3

Well, is it necessary to tag so many people?
Show your work, please.

Answer 4

9x +2 = x = 0 (mod 2)

so 9x +2 is even

thats one method

Answer 5

this is your 3rd time tagging me in a mass tag and i frankly do not find this amusing so it would be nice and the right thing to do if you ceased from this Tom Foolery because franlky im ticked off -_-

Answer 6

so much hatred for the mass tagging addicts :)

Answer 7

Can I mass tag next?

Answer 8

idk, i never felt it necessary to masstag ppl... maybe im here for long time i knw exactly who can help me wid my questions humm

Answer 9

@ganeshie8 Can you also prove it using a lemma (Pit-stop proof)

Answer 10

never heard of such proof in number theory; what is it ?

Answer 11

Try not to prove the second statement directly from the first statement, but rather prove something else from the first statement and use that proof to prove the second statement.

Answer 12

If you follow the modular proof above, thats exactly what we did.
from the first statement we got x = 0 (mod 2). this proves x is even.

we have used that in second statement and concluded

Answer 13

Fair enough. <3

Answer 14

:) your questions are nice ones... but ppl are getting mad cuz of masstag it seems -_-

Answer 15

Other people will only benefit from its greatness. 1 Corinthians 2:9.

Answer 16

quoting the bible are we?

Answer 17

lol lets establish some harmony ;)
http://batish.com/catalog/inst/Harmonium/

Answer 18

No I'm not, the actual verse is much greater:
However, as it is written:

“What no eye has seen,
what no ear has heard,
and what no human mind has conceived
the things God has prepared for those who love him—"

Answer 19

written where ?

Answer 20

1 Corinthians 2:9

Answer 21

http://www.biblegateway.com/passage/?search=1%20Corinthians%202&version=NIV#en-NIV-28404

Answer 22

see , in Hadeth for muslim there is somthing semi its like this
What no eye has seen, what no ear has heard, and what no human mind has conceived the things God has prepared for those who do good things

Answer 23

@ganeshie8 http://www.chick.com/m/reading/tracts/readtract.asp?stk=0001

Answer 24

scary lol :o

Answer 25

@FutureMathProfessor give us a tougher question pls xP

Answer 26

Ok gimme a little bit

Answer 27

By the way I'm overdosing on caffeine again like last night. Haven't slept in 42 hours now yolo

Answer 28

wtf???? ur joking right? @FutureMathProfessor 42 hours? that's actually really bad lol.

Answer 29

@genius12 When I was at college I was asleep 11-7 for four months nonstop. I Think I can live this horrible lifestyle for a week until I go back :)

Answer 30

ok gimme harda question nowsss