{8x - 7y = -5
{8x - 7y = 3
a. (-5 / 7, 3 / 8)
b. (8, 7)
c. (-5, 3)
d. no solution
2007-12-12 02:02:54 · 5 answers · asked by . 1 in Science & Mathematics ➔ Mathematics
I hate calling this the addition method, since you can subtract instead. I call it cancellation.
Subtract the two equations
0x - 0y = -8
0=8 is clearly impossible so there are no solutions.
Another way of thinking of this:
How can 8x-7y equal -5 and at the same time equal 3?
It can't! So there are no solutions.
2007-12-12 02:13:35 · answer #1 · answered by JG 5 · 0⤊ 0⤋
No solution: 8x - 7y can't be both -5 and 3.
2007-12-12 10:11:23 · answer #2 · answered by Amit Y 5 · 1⤊ 0⤋
No solution (d). Both equations are same. You have 2 same equations in x and y giving different numbers on the right hand side.
2007-12-12 10:15:27 · answer #3 · answered by cidyah 7 · 0⤊ 0⤋
d. no solution(because it has the same slope but a different y-intercept.
2007-12-12 10:12:25 · answer #4 · answered by Mariah B 3 · 0⤊ 0⤋
OPTION d
2007-12-12 10:17:27 · answer #5 · answered by Como 7 · 0⤊ 0⤋