Question

intr o livada sunt 450 pomi in primele 2 zile s au plantat 340 iar in ultimele 2 zilre 210 pomi cati s au plantat in a2 a zi

Answer 1

Fie a=prima zi, b= a doua zi, c= a treia zi
a+b=340}
b+c=210}=>(-)=>a+b-b+c=340-210=>a+c=130
a+b+c=450, dar a+c=130=>b+130=450=>b=450-130=>b=320
Cu placere :D