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A-15%2924=E
A=2924-E
2924-E-438,6=E
2924-438,6=2E
2485,4=2E
1242,7=E
2924-1242,7=A
1681,3=A
A=1681,3
E=1242.7
x + x + 0,15x = 2924
2,15x = 2924 | : 215
0,01x = 13,6 | x 100
x = 1360
Ewa => 1360
Agata => 13,6 x 115 = 1564
sprawdzenie: 1360 + 1564 = 2924