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Daca a+b+c=519sib+c=119atunci calculati a-(b+c);b+c-19;a+b+c-500

Răspuns :

a=519-119=400; a-(b+c)=400-119=281; b+c-19=119-19=100; a+b+c-500=519-500=19
(a+b+c)-(b+c)=> a=400
a-(b+c)= 400-119=..
b+c-19=100
a+b+c-500=19