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70-28=42 (autografy Ani)
42-28=14 (autografy Basi)
odp.: Ania ma 42 autografy, a Basia 14.
ania 70 - 40% *70
70 -28 = 42
basia 42 - 40%*42
42 - 17=25
40% z 70= 28
70-100%
x- 60% x=(70 × 60) ÷ 100= 42
Ania - 42 autografy
42- 28=14
Basia - 14 autografow
odp. Celina ma 70 autografow, Ania 42, a Basia 14.