Question

ana si maria au impreuna 840 de timpre. daca ana iar da mariei 120 de timbre , atunci cei doi ar avea acelasi nr de timbre. cate timbre are fiecare ?

Answer 1

A + M = 840
A - 120 = M + 120
A = M + 240
M + 240 + M = 840
2M = 840 - 240
M = 600 : 2
M = 300 timbre are Maria
A = 300 + 240
A = 540 timbre are Ana

Answer 2

|_____|....+120....|....+120....|....+120....| timbre Ana

|_____|....+120....| timbre Maria

840 - ( 120 + 120 + 120 + 120 ) =
840 - 480 =
360

1 + 1 = 2 (segmente egale )

360 : 2 = 180 (valoarea unui segment )

timbre Ana = 1 × 180 + 120 + 120 + 120 =
180 + 120 + 120 + 120 =
540

timbre Maria = 1 × 180 + 120 =
180 + 120 =
300

verificare:
540 + 300 = 840