Răspuns :
a + b+ c = 936
a +b = 534
a = 534-b
b +c =722
c = 722-b
534-b+b+722-b=936
534+722-936=b-b+b
320=b
a = 534-320
a=214
c = 722-320
c = 402
214+320+402= 936
a+b+c =936 ; inlocum a+b = 534 si il aflam pe c
534+c = 936 ; c = 936-534 = 402 ;
b+c = 722 ; b+402 = 722 ; b = 722-402 = 320 ;
a+320+402 = 936 ; a = 936-320-402 = 936 - 722 = 214 ;
