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3x + 2 = 8 ⇒ soal
3x = 8 - 2
3x = 6
x = 2
persamaan linier dua variabel
2x + y = 5
x + 4y = 6 ⇒soal
2x + y = 4 |×1| 2x + y = 4
x + 4y = 9 |×2| 2x + 8y = 18-
-7y = -14
y = 2
2x + y = 4
2x + (2) = 4
2x = 4 - 2
2x = 2
x = 1
maaf kalo salah