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21:7x9:6-4x1:4x1:1+153+63:9x7:7=(vreau detaliat)ajutor


Răspuns :

21:7=3
3x9=27
27:6=4.5
4.5-4=0.5(deoarece 4x1:1=4)
0.5+153=153.5
63:9=7
7x7=49
49:7=7
153.5+7=160.5