Question

un elev cheltue in 3 zile o suma.in prima zi jumate+12 in a2zi o treime +10 din ce aramas a3 zi12 ce suma a avut?

Answer 1

x=suma
x/2+12=ziua 1
x-(x/2+12)=x/2-12=rest
(x/2-12)×1/3+10=x/6-4+10=x/6+6=ziua 2
x/2+12+x/6+6+12=x
x/2+x/6+30=x
3x+x+180=6x
2x=180
x=90 lei