Răspuns :
Răspuns:
a=4b/5 ; b=5a/4
a)b/a=5/4
b)5a/b=20/5=4
c)7b/3a=7b•5/12b=35/12
d)(b-a)/(b+a) = (b - 4b/5) : (b + 4b/5) = 1/5
e)(20+b)/(50-b) = (20 + 5a/4)/(50 - 5a/4) = ???
f)(16b^2/25 + b^2) : (b^2 + 8b/5 • b) =
41b^2/25 • 5/13b^2 = 41/65
Răspuns:
a=4b/5 ; b=5a/4
a)b/a=5/4
b)5a/b=20/5=4
c)7b/3a=7b•5/12b=35/12
d)(b-a)/(b+a) = (b - 4b/5) : (b + 4b/5) = 1/5
e)(20+b)/(50-b) = (20 + 5a/4)/(50 - 5a/4) = ???
f)(16b^2/25 + b^2) : (b^2 + 8b/5 • b) =
41b^2/25 • 5/13b^2 = 41/65