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Afla nr ,,c" 36:6:3X4X5-10X8-c=56:7:4 ofer coroana

Răspuns :

6:3×4×5-80-c=8:4
2×4×5-80-c=2
8×5-80-c=2
40-80-c=2
-40-c=2
-c=-40-2
-c=-42 => c=42
rezolvare:
2x4x5-80-c=2
40-80-c=2
-40-2=c
c=42