diketahui sistem persamaan 3a+2b=8 dan a-5b = - 37.nilai dari 6a+4a

3a + 2b = 8 | ×1 |
a - 5b = -37 | ×3 |
-------------------------
3a + 2b = 8
3a - 15b = -111
-------------------- -
17 b = 119
b = 7

3a + 2b = 8
3a + 2 (7) = 8
3a + 14 = 8
3a = -6
a = -2

Maka,
6a + 4b
= 6 (-2) + 4 (7)
= -12 + 28
= 16
Jawaban : C

3a + 2b = 8 | 1 | 3a + 2b = 8
a - 5b = -37 | 3 | 3a - 15b = -111
-------------------------- -
17b = 119
b = 7
a - 5b = - 37
a - 5(7) = - 37
a - 35 = -37
a = -37+35
a = -2
6a + 4b
6(-2) + 4(7) = -12+ 28= 16
jadi jawaban nya C