tentukan hasil penyelesaian dari 1. 4x+y=8 dan x+2y=10. 2. x=y+2 dan y=2x-5. 3. 2x-3y=11 dan 3x+y=0. 4. 2x+3y=0 dan x+y=1. 5. 4x+3y=6 dan 2x-y=3. te

1) 4x + y = 8 |×2
x + 2y = 10
maka
8x + 2y = 16
x + 2y = 10
------------------(-)
7x = 6
x = 6/7
• 4x + y = 8
x + 2y = 10 |×4
maka
4x + y = 8
4x + 8y = 40
------------------(-)
- 7y = - 32
y = 32/7
hp = ( 6/7 , 32/7 )

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

3) 2x - 3y = 11
3x + y = 0 |×3
maka
2x - 3y = 11
9x + 3y = 0
------------------(+)
11x = 11
x = 1
• 2x - 3y = 11 |×3
3x + y = 0 |×2
maka
6x - 9y = 33
6x + 2y = 0
------------------(-)
- 11y = 33
y = - 3
hp = ( 1 , - 3)

4) 2x + 3y = 0
x + y = 1 |×2
maka
2x + 3y = 0
2x + 2y = 2
------------------(-)
y = - 2
• 2x + 3y = 0
x + y = 1 |×3
maka
2x + 3y = 0
3x + 3y = 3
----------------(-)
- x = - 3
x = 3
hp = ( 3,-2)

5) 4x + 3y = 6
2x - y = 3 |×2
maka
4x + 3y = 6
4x - 2y = 6
----------------(-)
5y = 0
y = 0
• 4x + 3y = 6
2x - y = 3 |×3
maka
4x + 3y = 6
6x - 3y = 9
-----------------(+)
10x = 15
x = 15/10
x = 3/2
hp = ( 3/2 , 0)