Need help with Algebra...pleaseee....?

1 ⤊

Need help with Algebra...pleaseee....?

Find the value of x and y

1) 3x - y + 4z = -7
2x + y - z = 16
5x - 3y + 2z = -13

2) 4x - 3y = 5
-8x + 6y = 7

2007-12-10 21:22:28 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

2 answers

Question 1
5x + 3z = 9

6x + 3y - 3z = 48
5x - 3y + 2z = - 13------ADD

11x - z = 35
5x + 3z = 9

33x - 3z = 105
5x + 3z = 9---------ADD

38x = 114
x = 3

15 + 3z = 9
3z = - 6
z = - 2

6 + y + 2 = 16
y = 8

x = 3 , y = 8 , z = - 2

Question 2
8x - 6y = 10
8x - 6y = - 7
No solution.

2007-12-10 21:32:03 · answer #1 · answered by Como 7 · 1⤊ 1⤋

x=3
y=-2
2nd No solution

2007-12-11 05:30:15 · answer #2 · answered by someone else 7 · 0⤊ 2⤋