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Ajutor : 1972 - (x-73) = 213
Dau coronita


Răspuns :

1972 - (x-73) = 213x-73=1972-213
x-73=1759
x=1759+73
x=1832
x-73=1972-213
x-73=1759
x=1759+73
x=1832