Solve this system of equations: 2x-5y+4z=18 x+3y+5z=7 -3x-2y+4z=22

Question

Solve this system of equations:    2x-5y+4z=18    x+3y+5z=7    -3x-2y+4z=22

anonymous · Answer

@ganeshie8 im bothering u alot today, but help please >.<

ganeshie8 · Answer

hey np,  gimme one sec

anonymous · Answer

ok thank u :)

ganeshie8 · Answer

$$
2x-5y+4z=18     -------------- (1)\ 
x+3y+5z=7    -----------------(2)\
-3x-2y+4z=22 ------------(3) \

$$

anonymous · Answer

is that all i have to put?

ganeshie8 · Answer

lol you're kidding... we need to solve x, y, z here

ganeshie8 · Answer

we do that step by step, do you need to show work. or is this a multiple choice q ?

anonymous · Answer

its not multiple choice but i dont needa show work either.

ganeshie8 · Answer

then you can use wolfram

anonymous · Answer

oh okay true how do i plug it in?

ganeshie8 · Answer

ganeshie8 · Answer

wolfram is super smart, since you're graduating in a while its good you get a hang of it for problems like these. you can avoid the donkey work..

anonymous · Answer

cool thanks for the website & help! i got it.

ganeshie8 · Answer

great !

ganeshie8 · Answer

but use it, only when you are familiar wid the method of solving these equations by yourself. that is, use it when you feel lazy ;p

anonymous · Answer

haha okaay i sure will :p

ganeshie8 · Answer

i trust you i hope i didnt do a mistake by guiding you to that website :S

anonymous · Answer

no i also know another website called mathway that solves problems for you too but i only use it when neccesary :p so ur trust is worthy in me! lol

ganeshie8 · Answer

sounds we're good :)

ganeshie8 · Answer

and just to show u how smart wolfram is :- you posted a question asking for a line with slope -3/4, and goes through point (5,9) : see, what wolfram gives :- http://www.wolframalpha.com/input/?i=slope+-3%2F4%2C+point+%284%2C+5%29

ganeshie8 · Answer

* point (4, 5)

anonymous · Answer

Ooo ok i see but do i put the equation form that wolfram is showing or the other person that replied? :o

ganeshie8 · Answer

ok ima answer it here

ganeshie8 · Answer

the q is asking you for standard form. do you knw what a standard form is ?

anonymous · Answer

yes like typed out/written out.

ganeshie8 · Answer

standard form of a line is this :

Ax + By = C

anonymous · Answer

ok

ganeshie8 · Answer

3x+4y-32 = 0

3x + 4y = 32

ganeshie8 · Answer

thats the standard form of line

anonymous · Answer

so those two are my answrs

ganeshie8 · Answer

only one is our answer :

ganeshie8 · Answer

3x + 4y = 32

ganeshie8 · Answer

Standard Form must have the form :
Ax + By = C

anonymous · Answer

3x+4y=32?

anonymous · Answer

oh ok got it!

ganeshie8 · Answer

yes ! finally ;)

anonymous · Answer

:D