Jawab:
3a-4b = -8 ||×2|| 6a-8b = -16
2a+3b = 23 ||×3|| 6a+9b = 69
(Dikurangi)
➡ -17b = -85
b = 5
2a+3.5 = 23
2a = 23-15
2a = 8
a = 4
Nilai 2a-b = 2.4 - 5
= 8 - 5
= 3
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Jawab:
3a-4b = -8 ||×2|| 6a-8b = -16
2a+3b = 23 ||×3|| 6a+9b = 69
(Dikurangi)
➡ -17b = -85
b = 5
2a+3.5 = 23
2a = 23-15
2a = 8
a = 4
Nilai 2a-b = 2.4 - 5
= 8 - 5
= 3
Semoga membantu ;)