Răspuns:
Explicație pas cu pas:
a+b=600
a+20a\100+b+10b\100=696
(100a+20a)\100+(100b+10b)\100=696
120a\100+110b\100=696
(12a+11b)\10=696
12a+11b=696·10
12a+11b=6960
a+b=600 ·11
12a+11b=6960
⇔-11a-11b=-6600
12a+11b=6960
-a \=-360
a=360
360+b=600
b=600-360
b=240
V= 360+240=600