Question

daca elevii unei clase sut asezati cate doi in banca ,atunci un elev sta singur si 6 banci sunt goale daca sunt asejati cate 3 in banca atunci raman 12 banci goale cati elevi si cate banci sunt in clasa ?

Answer 1

x=elevii
y=bancile
x=2(y-6)+1
x=3(y-12)
Le egalam:
2(y-6)+1=3(y-12)
2y-12+1=3y-36
2y-11=3y-36
3y-2y=-11+36
y=25 banci
x=3(25-12)
x=3*13=39 elevi.
Hope you understood.