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x = becak
y = ojek motor
eliminasi
1x + 1y = 10 | x 2
3x + 2y = 23 | x 1
2x + 2y = 20
3x + 2y = 23
-x = -3
x = 3
substitusi
x + y = 10
3 + y = 10
y = 7
jadi, jumlah becak ada 3 dan jumlah ojek motor ada 7
ada pertanyaan?