Question

solve system by substitution:
2x-y+z=-4
z=5
-2x+3y-z=-10
need to find x,y,and z
i don't know which steps comes first in solving

Answer 1

so if Z=5 substitute z for 5 in every problem
so the first one will be
2x-y+5=-4
I dont really know how to find x and y but theres z

Answer 2

ohoh so like do
-y+-20 (5(z)+-4)=2x

Answer 3

thank you so much!! i think i get it now!

Answer 4

yay :D I remember doing systems, they're easy once you get it

Answer 5

well, im like so slow when it comes to math! everything else im smart, but once i get something i normally don't forget! lol

Answer 6

haha its the opposite for me xD math is my strong point

Answer 7

ugh i would give anything to be like that! i have ADD so it makes it so much harder as well

Answer 8

I have adhd as well >.> it's annoying huh

Answer 9

i know right!!!

Answer 10

the only school things im good at is math and art xD everything else is just no.

Answer 11

i did the problem and i was getting x=1/2.... my answer options are (-8,7,5)
(-8,-7,5) and (8,-7,5)

Answer 12

hmm
well actually if you have answer options just plug those in for x y and z and solve the equation until one comes out right?

Answer 13

ew i didn't think bout that -_-

Answer 14

it's easier then everything else I guess

Answer 15

i made a 100 yay!! thank you

Answer 16

np <3