Question

Folosind proportii derivate aflati x din :

a ) x+1 supra x = 7 supra 6

b) x supra x+2 = 7 supra 9

c) x supra 8 = x+1 supra 9

Answer 1

a) (x+1-x)/x = (7-6) /6 ⇒ 1/x=1/6⇒x=6

b) x/(x+2-x) = 7/(9-7) ⇒ x/2=7/2⇒ x=7

c) x/x+1=8/9⇒ x/(x+1-x) = 8/(9-8) ⇒ x/1=8/1 ⇒ x=8