metoda algebrica:
m + n = 280
m - n = 180 => m = n +180
inlocuim in prima ecuatie pe m
n + 180 + n = 280
2×n = 280-180
2×n = 100
n = 100:2
n = 50
m = 280-50 = 230
sau metoda grafica:
m |_____|+180
n |_____|
avem 2 segmente egale +180 = 280
280 - 180 = 100
100 : 2 = 50 (un segment egal)
m = 50+180 = 230
n = 50
Verificare:
230+50 = 280
230-50 = 180
m = 230
n = 50
