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8*3 = 24
24 / 1600
Na 1600 ołówków x ołówków nie spełnia normy.
Mnożymy więc na przemian.
3 ----------- 200
x ----------- 1600
x = 3 * 1600 / 200
x = 3 * 8
x = 24
Można też:
200 * x = 3 * 1600
200x = 4800 / 200
x = 24