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=20+3x3
=29
2) 6/x=360/1200
7200=360x
x=7200/360=20
2. 6/360 = x/1200
7200 = 360x
x = 20 menit
3. 4 jam = 240 menit
240 x 90 = 21600/80 = 270 menit = 4 jam 30 menit
80