elmintion

2007-09-23 6:00 am
1.
3f – 4g – 1 = 0
{
2f + 3g – 4 = 0

2.
4(x - 1)- 5(2 – y) = 0
{
26x + 3y + 27 = 0

3.
3x – 2y = 10
{
3y – 4x = 17

4.
10x + 12y = -1
{
9y – 4x = 5

5.
5x = 2(1 – y)
{
2x + 5y = 5
Please help me !!

回答 (2)

2007-09-23 6:46 am
✔ 最佳答案
1. a 3f-4g-1=0 *2
b 2f+3g-4=0 *3
a=6f-8g-2=0
b=6f+9g-12=0

b-a
6f+9g-12=0
-
6f-8g-12=0

g-14=0
g=14
2007-09-23 8:21 am
1) f = 19/17, g = 10/17

2) x = -177/118, y = 236/59

3) x = 64, y = 91

4) x = -1/2, y = 1/3

5) x = 0, y = 1

2007-09-23 00:23:31 補充:
There may be some arithmetic errors so it's best to just use it as a reference


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