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cum se rezolva
19+37-x=14 si
x-28+17=34


Răspuns :

-x=-19-37+14=-42
x=42

si al doilea ex.
x-11=34
x=34+11=45
19+37-x=14
19+37-14=x
x=56-14
x=42

x-28+17=34
x=34-17+28
x=17+28
x=45