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AFLA VALOAREA LUI X DIN EXPRESIA:

X-(1+2+3+........+48)=3520


Răspuns :

1+2+.....+48=48:2*49=24*29=1176
x-1176=3520
x=3520=1176
x=4696

x-(1+2+3+....+48)=3520
x-(48*49:2)=3520
x-(24*49)=3520
x-1176=3520
x=3520+1176
x=4696