2007-10-08 17:38:44 · 4 answers · asked by Sofia T 1 in Science & Mathematics ➔ Mathematics
add equation 1 n 3
x+2y+5z= -1 +
3x+4y-4z= 14
-------------------------
4x+6y+z=13
subtract equation 2 with the result
4x+6y+z=13 -
2x- y +z= 2
-------------------------
2x+7y = 11
i think this is the answer which u wanted by eliminatin z
2007-10-08 17:48:16 · answer #1 · answered by shruthi 2 · 0⤊ 0⤋
8x - 4y + 4z = 8
3x + 4y - 4z = 14-----ADD
11x = 22
x = 2
2y + 5z = - 3
-y + z = - 2
2y + 5z = - 3
-2y + 2z = - 4-------ADD
7z = - 7
z = - 1
2y - 5 = - 3
2y = 2
y = 1
x = 2, y = 1, z = - 1
2007-10-09 06:02:58 · answer #2 · answered by Como 7 · 1⤊ 0⤋
OMG! are you tryin to give me a headache?
good luck bro.
2007-10-09 00:41:21 · answer #3 · answered by islandmonkey 3 · 0⤊ 1⤋
z is eliminated
2007-10-09 00:40:54 · answer #4 · answered by Handsome Black guy 5 · 0⤊ 1⤋