Răspuns :
[tex]\text {Metoda~grafica~:}[/tex]
a |-----|-----|-----|-----|-16-|
b |-----|-------379----------|
379-16=363 (3 segmente egale)
363:3=121 (1 segment)
a=121×4+16=500
b=121
a |-----|-----|-----|-----|-16-|
b |-----|-------379----------|
379-16=363 (3 segmente egale)
363:3=121 (1 segment)
a=121×4+16=500
b=121
a - b = 379
(4b+16) - b = 379
4b +16 - b = 379
3b + 16 = 379
3b = 379 - 16
3b = 363
b = 363 : 3
b = 121
(4b+16) - b = 379
4b +16 - b = 379
3b + 16 = 379
3b = 379 - 16
3b = 363
b = 363 : 3
b = 121