Pre-Calculus work. Can anyone help?

K

KP19633

New member
1. Use the elimination method to solve the system of equations
3x-24=42
5x+7y=-23
The solution set is {( , )}
#2.
5x-6y-4=0
6x+5y-78=0
The solution set is {( , )}
#3
3x-4y=3
-6x+8y=-6
The solution set is {( , )}
#4
2x+3y=1
4x+6y=2
The solution set is {( , )}
#5 Solve
x+y+z=-2
2x+4y+2z=-4
-x+9y-3z=-6
write the solution as an ordered triple.
#6 Solve the system analytically
x+y+z=4
2x+4y+2z=16
-x+6y-3z=30
The solution set is {( , , ,)}
THANKS! I have been sitting at my computer for hours solving over 20 problems, and these ones I just can't seem to figure out.
 
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