Question

calculeaza suma a+b+c stiind ca a,b + b,c + c,a=7,7

Answer 1

[tex]\overline{a,b}+\overline{b,c}+\overline{c,a}=7,7\\ a+0,1b+b+0,1c+c+0,1a=7,7\\ a+b+c + 0,1(a+b+c)=7,7\\ (a+b+c)(1+0,1)=7,7\\ 1,1(a+b+c)=7,7\\ a+b+c = \frac{7,7}{1,1}= \frac{77}{11} = 7[/tex]