Răspuns :
a * b = 80
a = 3,2b
3,2b * b = 80
3,2 b² = 80
b² = 80 : 3,2
b² = 25
b = √25
b = 5
a = 3,2 * 5
a = 16
a = 3,2b
3,2b * b = 80
3,2 b² = 80
b² = 80 : 3,2
b² = 25
b = √25
b = 5
a = 3,2 * 5
a = 16
a x b = 80
a = 3.2 b
3.2b x b = 80
b=80:3.2
b=25
b=25 : 5
b= 5
a=3.2 x 5
a= 16
a = 3.2 b
3.2b x b = 80
b=80:3.2
b=25
b=25 : 5
b= 5
a=3.2 x 5
a= 16