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No 
1.Nomor ini kurang jelas maksudnya Tolong diperjelas
2.RP 75.000
3.Damar 30 Meter,Satria 50 Meter

1. 8 + 5 = 5 + 8
13 = 13 (mungkin)

2. roti = Rp2.250 × 15 = Rp33.750
minuman = Rp2.750 × 15 = Rp41.250

Rp33.750 + Rp41.250 = Rp75.000

3. Satria = 125cm × 47 = 5875cm
Damar = 75cm × 47 = 3525cm

Satria = 5875cm - (125cm × 7)
=5875cm - 875cm
=5000cm = 50m

Damar = 3525cm - (75cm × 7)
=3525cm - 525cm
=3000cm = 30m