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-7p-3p<-22-8
-10p<-30
p>3
-7p + 8 < 3p - 22
-7p - 3p < -22 - 8
-10p < -30
p < 3
2)
40 pakaian = 60 m
10 pakaian = x m
40/10 = 60/x
40x = 600
x = 600/40
x = 15
Jadi, panajang benang yang digunakan untuk 10 pakaian adalah 15m