Question

afla numerele a,b,c,stiind ca a+b+c=769,a+b=547,b+c=554

Answer 1

547+c=769
c=769-547
c=222


a+554=769
a=769-554
a=215


b=769-(222+215)
b=769-437
b=332

Answer 2

$a+b+c=769 \\ a+b=547 \\ b+c=554 \\ a+b+c=769 \Rightarrow 547+c=769 \Rightarrow c=769-547 \Rightarrow \boxed{c=222} \\ b+c=554 \Rightarrow b+222=554 \Rightarrow b=554-222 \Rightarrow \boxed{b=332} \\ a+b=547 \Rightarrow a+332=547 \Rightarrow a=547-332 \Rightarrow \boxed{a=215} \\ Verificare : 215+332+222=547+222=\boxed{769}$