Question

Sa se rezolve in R ecuatia: a) |x+1|=2 b)|x+4|=x-3

Answer 1

Notăm : Prima zi=a A doua zi=b A treia zi =c a+b+c=55 b=a:2+2 c=14 a+b=55-14 a+b=41 a+a:2+2=41 a+a+2=41x2 a+a+2=82 a+a=80 a=80:2 a=40 b=40:2+2 b=20+2 b=22