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va roggg!!!!am nevoie de ajutor urgent....coroana+multumesc:
1) stiind ca x+2y+13=24,determinati 18+2y+x
2)stiind ca 2x +2y+38=62,determinati 4y+27+4x
3)stiind ca 3x+2y+4z=20,determina 4z+43+2y+27+3x