tolong!! No 5 a-d Dengan cara eliminasi
Matematika
DewiRradini
Pertanyaan
tolong!!
No 5 a-d
Dengan cara eliminasi
No 5 a-d
Dengan cara eliminasi
1 Jawaban
-
1. Jawaban Arkan5283
A.
2x - y = 0|× 2
3x - 2y = - 3|× 1
4x - 2y = 0
3x - 2y = - 3
_________—
x = 3
2x - y = 0|× 3
3x - 2y = - 3|× 2
6x - 3y = 0
6x - 4y = - 6
_________—
y = 6
B.
- 2x + 3y = 7|× 8
5x + 8y = - 2|× 3
- 16x + 24y = 56
15x + 24y = - 6
____________—
- 31x = 62
x = - 2
- 2x + 3y = 7|× 5
5x + 8y = - 2|× 2
- 10x + 15y = 35
10x + 16y = - 4
____________+
31y = 31
y = 1
C.
3x + 3 = 3y
3x - 3y = - 3
3x - 3y = - 3|× 2
2x - 6y = 2|× 1
6x - 6y = - 6
2x - 6y = 2
_________—
4x = - 8
x = - 2
3x - 3y = - 3|× 2
2x - 6y = 2|× 3
6x - 6y = - 6
6x - 18y = 6
_________—
12y = - 12
y = - 1
D.
5x = 4y + 8
5x - 4y = 8
3y = 3x - 3
3y - 3x = - 3
- 3x + 3y = - 3
5x - 4y = 8|× 3
- 3x + 3y = - 3|× 4
15x - 12y = 24
- 12x + 12y = - 12
____________+
3x = 12
x = 4
5x - 4y = 8|× 3
- 3x + 3y = - 3|× 5
15x - 12y = 24
- 15x + 15y = - 15
____________+
3y = 9
y = 3
Maaf Kalau Salah