Question

S-au plantat prima zi 1/3 din numarul total de puieti de brad, a doua zi 40% din numarul ramas de puieti , iar a treia zi restul de 180 de puieti, Cati puieti s-au plantat in total?
Urgentttttttt

Answer 1

______/_______/______/
  1 ZI
___/___/___/___/__/
    2 ZI   
180:3=60
60*5=300
300:2=150
150*3=450 PUIETI

Answer 2

prima zi⇒1/3·x⇒x/3;
a doua zi⇒40/100·[x-x/3]=40/100·2x/3=40/50·x/3=4/5·x/3=4x/15;
a treia zi=180 de puieti;
⇒x/3+4x/15+180=100/100[100 la suta];
⇒9x/15+180=100/100
⇒9x/15=100/100-180
⇒3x/5=100/100-180 ,3x/5=33,[3] la suta +40 la suta=73,[3] la suta;
⇒73,[3] la suta=100[la suta]-180
⇒180=26,[6] la suta;
⇒240/9·x=180
⇒80/3·x=180⇒x=27/4;