Question

aflati numarul rational x stiind ca a) media aritmetica a numerelor 1,01;x si5,4 este 3,24 b) media aritmetica a numwrelor 5,13;0,25;1,7 si x este 2,12

Answer 1

(1,01+x+5,4)/3=3,24
6,41+x=3,24·3
6,41+x=9,72
x=9,71-6,41
x=3,31

b) (5,13+0,25+1,7+x)/4=2,12
7,08+x=2,12·4
7,08+x=8,48
x=8,48-7,08
x=1,4