Răspuns :
a - b = 315
a : 4 = b=> a = 4b
4b - B = 315
3b = 315
b = 315 : 3
b = 105
a = 105 + 315
a = 420
a : 4 = b=> a = 4b
4b - B = 315
3b = 315
b = 315 : 3
b = 105
a = 105 + 315
a = 420
a-b=315
a=4b⇒4b-b=315⇒3b=315⇒b=315:3⇒b=105⇒a=4×105⇒a=420
a |___|___|___|___|
b |___|
a=4b⇒4b-b=315⇒3b=315⇒b=315:3⇒b=105⇒a=4×105⇒a=420
a |___|___|___|___|
b |___|