It turns out that I need to have these questions done by 6:30 (EST) so Im moving it to the Urgent Thread, ( I have to go to my school for a class event and my teacher wants me to come in for the test due to her being absent on monday). Sorry for the thread switch, Thanks in advance!
Here are the questions:
2x - 3y = 5
4y + 2z = -6
5x + 7z = -15
Solve for X Y and Z using substitution or elimination.
EDIT :I Recently tried to use a homework help online service who gave me the answer ( I didnt understand their work though) For this they got x=4 y=1 and z=-5
2x + 3y - z = 9
x - 3y + z = -6
3x + y - 4z = 31
Solve for X Y and Z using substitution or elimination. (Same as before)
6/x - 4/y = 1
-3/x + 3/y = 2
Solve for X and Y (6/x, 4/y , -3/x and 3/y and fractions) using substitution
EDIT: Same homework help (Once again Didn't Understand what the heck their work meant but..) They Got for X=6/11 and Y=2/5
Thank you in advance and please show your work so I can understand it.