Question

un calator parcuege un drum in 3 zile.in prima zi 1/3 din tot drumul a doua zi 1/4 din drumul ramas iar a treia zi 18 km.ce lungime a avut drumul.

Answer 1

x-nr de km parcursi de calatori<br />x/3-nr de km parcursi in prima zi<br />(x-x/3)/4-nr de km parcursi in a doua zi<br />18-km parcursi in a treia zi<br />x=x/3+(x-(x/3))/4+18<br />x=4x/12+(3×(x-x/3))/12+18<br />12x=4x+3×(x-x/3)+216<br />12x=4x+3x-x+216<br />12x=6x+216<br />6x=216 x=216/6 x=36