-9x+3y=6
3x-y=7
2007-05-07 14:44:48 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
multiply the bottom equation by 3 and add it to the top equation to get: 6y=27, so y=9/2 and to get x substitute the y-value into the second equation and solve.
2007-05-07 14:49:24 · answer #1 · answered by bruinfan 7 · 0⤊ 0⤋
-9x + 3y = 6
3x - y = 7
Multiply the 2'nd equation by 3.
-9x + 3y = 6
9x - 3y = 21 Add them together
0x + 0y = 27
Oops...... This one doesn't -have- a solution âº
Doug
2007-05-07 21:51:36 · answer #2 · answered by doug_donaghue 7 · 0⤊ 0⤋
y= -7 + 3x
-9x + 3(7 + 3x) = 6
-9x - 21 + 9x = 6
- 21= 6
NO SOLUTION
2007-05-07 21:59:36 · answer #3 · answered by aayybb 1 · 0⤊ 0⤋
3y = 6 + 9x
y = 2 + 3x
3x - (2+3x) = 7
3x - 2 - 3x = 7
3x - 3x = 9
0=9
NO SOLUTION
2007-05-07 21:55:54 · answer #4 · answered by meh 2 · 0⤊ 0⤋