Question

Va rog mult de tot..
P.S:Sorry ca se vede mai intuneric

Answer 1

notam cu a=Maria,b=Mihai,c=Teodor

a+b+c=48
a=b+3
c=b:2

b+3+b+b/2=48
2b+6+2b+b=96
5b=96-6
b=90:5
b=18 kg a cules Mihai
c=18:2=>c=9 kg a cules Teodor
a=18+3=>a=21 kg a cules Maria

Answer 2

M + Ma + T = 48 kg menta
Ma = M + 3
T = M : 2 ==> M = 2×T

M |____|____|
Ma |____|____|+3
T |____|
48 - 3 = 45
45 : 5 = 9 (un segment egal)
M = 2 × 9 = 18 kg (Mihai)
Ma = 2 × 9 + 3 = 18 + 3 = 21 kg (Maria)
T = 9 kg (Teodor)

Verificare:
18 + 21 + 9 = 48 kg