Question

Aflați x din proporțiile: c)9 supra x+1=10 supra x+2. D)x+1 supra x-5=5 supra 2

Answer 1

9/x+1=10/x+2
9(x+2)=10(x+1)
9x+18=10x+10
9x-10x=10-18
-x=-8
x=8
x+1/x-5=5/2
(x+1)2=(x-5)5
2x+2=5x-25
2x-5x=-25-2
-3x=-27
x=-27/-3
x=9