Răspuns :
x-400=y+670=3200
x-400=y=3200-670
x-400=y=2530
x-400=2530
x=2530+400
x=2930
Răspuns:
a-400+670=3200
a-400=3200-670
a-400=2530
a=2530+400
a=2930
Verificare
2930-400+670=3200
x-400=y+670=3200
x-400=y=3200-670
x-400=y=2530
x-400=2530
x=2530+400
x=2930
Răspuns:
a-400+670=3200
a-400=3200-670
a-400=2530
a=2530+400
a=2930
Verificare
2930-400+670=3200