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Jawab:
MISALKAN :
Buku = x
Pensil = y
pulpen = z
2 buku = 2.x : 2x
5 pensil = 5.y : 5y
3 Pulpen = 3.z : 3z
jadi, 2x+5y+3z
Keterangan :
saya bikin cerita beseta soal dan jawaban, barangkali disuruh dengan soal serta jawaban. semoga membantu