Răspuns :
a + b = 175,24
si a = 4*b
=> 4b+b = 175,24
deci b = 175,24:5 =35,048
si a = 175,24 - 35,048 = 140,192
a + b = 175,24 si a = 4 b
4b + b =175,24⇒5b = 175,24⇒b = 175,24 : 5
b = 35,048 si a = 4b = 4 × 35,078 = 140,192
verificare a+b = 35,048+140,192=175,24
175,24=175,24