Question

Maria si Sara au impreuna 192 de timbre. Daca Sara ii da Mariei 36 de timbre ele au un nr egal de timbre. Cate timbre a avut fiecare initial?

Answer 1

m+s=192
s-36=m+36=>s=m+72

m+m+72=192
2m=120
m=60
s=132

Answer 2

M+S = 192 timbre
S-36 = M+36
S-M = 36+36 = 72
S = M+72
M |___|
S |___|+72
avem 2 segmente egale +72 = 192
192 -72 = 120
120 : 2 = 60 (un segment egal)
M = 60
S = 60+72 = 132

Verificare:
60+132 = 192
132-36 = 60+36
96 = 96

60 timbre Maria
132 timbre Sara