diketahui sistem persamaan 4x - 7y = -26 dan 6x -3y = 6. nilai dari 3x -2y adalah

MAPEL = MATEMATIKA
KELAS = 8
BAB = SPLDV

eliminasi nilai x

4x - 7y = -26 |×3
6x - 3y = 6 |×2

12x - 21y = -78
12x - 6y = 12
____________-
-15y = -90
y = -90/-15
y = 6

subtitusi nilai y

6x - 3y = 6
6x - 3(6) = 6
6x - 18 = 6
6x = 6 + 18
6x = 24
x = 24/6
x = 4

nilai 3x - 2y
= 3(4) - 2(6)
= 12 - 12
= 0

semoga membantu