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9572-d+12200-8324=5000

Răspuns :

9572-d+12200-8324=5000
9572-d+3876=5000
9572-d=5000-3876
9572-d=1124
d=9572-1124
d=8448
9572-d+12200-8324=5000
9572-d+12200=5000+8324
9572-d+12200=13324
9572-d=13324-12200
9572-d=1124
d=9572-1124
d=8448