tolong di kerjakan dari no 2 hingga 10

2)• 3x + 2y = 12
2x - y = 3 |×2
maka
3x + 2y = 12
4x - 2y = 6
-------------------(+)
7x = 18
x = 18/7
• 3x + 2y = 12 |×2
2x - y = 3 |×3
maka
6x + 4y = 24
6x - 3y = 9
-------------------(-)
7y = 15
y = 15/7
hp = { 18/7 , 15/7 }

3) • 2x + 3y = - 5
x - y = 2 |×2
maka
2x + 3y = - 5
2x - 2y = 4
-------------------(-)
5y = - 9
y = - 9/5
• 2x + 3y = - 5
x - y = 2 |×3
maka
2x + 3y = - 5
3x - 3y = 6
-------------------(+)
5x = 1
x = 1/5
hp = ( 1/5 , - 9/5 )

4) 2x + 3y = 6
3x - y = - 2 |×3
maka
2x + 3y = 6
9x - 3y = - 6
------------------(+)
11x = 0
x = 0
• 2x + 3y = 6 |×3
3x - y = - 2 |×2
maka
6x + 9y = 18
6x - 2y = - 4
--------------------(-)
11y = 22
y = 2
hp = { 0,2 }

5) 4x - 3y = 15 |×2
- 3x + 2y = - 12 |×3
maka
8x - 6y = 30
- 9x + 6y = - 36
---------------------(+)
- x = - 6
x = 6
• 4x - 3y = 15 |×3
- 3x + 2y = - 12 |×4
maka
12x - 9y = 45
- 12x + 8y = - 48
------------------------(+)
- y = - 3
y = 3
hp = { 6 , 3 }

6) 4x - 7y = - 2
2x + 3y = 12 |×2
maka
4x - 7y = - 2
4x + 6y = 24
-------------------(-)
- 13y = - 26
y = - 2
• 4x - 7y = - 2 |×3
2x + 3y = 12 |×7
maka
12x - 21y = - 6
14x + 21y = 84
----------------------(+)
26x = 78
x = 3
hp = ( 3 , - 2)