Question

12 Dacă a +2.b=5 și b+2.c =91, atunci calculati
3 Efectuati:
a [(32)5:37 - 3° - 3?].4:34 + 22;
b [123+2?.22 +267:227]:[123+214 : 25+(2) 8 );
c(254)° :(42 +32)11 - (02010 + 12012 + 2013°)?;
d [33. 3+245:242 +(35)6:329 +9°]:31;
e (28 +92 +56 +36):(06 +44 +34 +253 +64).
Efectuați
a 420 +7.8-5-139-6(1707-63.27)11-​

Answer 1

5*a+13*b+6*c=5*a+10*b+3*b+6*c=5*(a+2*b)+3*(b+2*c)=5*5+3+91=25+273=298