Diketahui sistem persamaan 3x + 2y = 17 dan

Jawab:

Penjelasan dengan langkah-langkah:

3x + 2y = 17

3x= -2y+17

x= 1/3(-2y+17)

2x + 3y = 8

2 (1/3(-2y+17)) + 3y = 8

2/3(-2y+17) + 3y = 8

2(-2y+17) + 9y = 24

-4y + 34 + 9y = 24

5y = -10

y = -2

2x + 3y = 8

2x + 3(-2) = 8

2x = 8 + 6

x = 7

jadi m + n = 7 + (-2) = 5

Diketahui :
3x + 2y = 17
2x + 3y = 8
m = x dan n = y

Ditanya :
m + n?

Jawab :
3x + 2y = 17 | ×3 |
2x + 3y = 8 | ×2 |

9x + 6y = 51
4x + 6y = 16
_________ –
5x = 35
m = x = 7

2x + 3y = 8
2(7) + 3y = 8
14 + 3y = 8
3y = -6
n = y = -2

= m + n
= 7 + (-2)
= 5 (A)