Question

Un biciclist a parcurs distanta de 700 KM in trei zile astfel : in primele doua 513.KM iar in ultimele doua 462 km .

Cati Km a parcurs in fiecare zi

Answer 1

x+y+z=700
x+y=513
z=700-513
z=187 km a treia zi
y+z=462
y+187=462
y=462-187
y=275 km a doua zi
x+y=513
x+275=513
x=513-275
x=238 km in prima zi

Answer 2

prima zi notez cu 1
a doua zi cu 2
a treia zi cu 3
1+2=513 km
2+3= 462 km
1+2+3=700 km
inlocuim 1+2 cu 513 km
513 km + 3 =700 km
3 = 700 km-513 km
3 = 177 km
2+177=462 km
2 = 462 km - 177 km
2 = 295 km
1+295 = 513 km
1 = 513 km - 295 km
1 = 228 km
Verivicare : 228 km+295 km+177 km = 700 km