4) x=?
[tex] \frac{x+2}{x} = \frac{9}{2} [/tex]
==> 9x=2(x+2)
9x=2x+4
9x-2x=4
7x=4
x=[tex] \frac{4}{7} [/tex]
5)x=?
[tex] \frac{5}{5-x} = \frac{3}{7} [/tex]
==>(5-x)3=7x
15-3x=7x
15=7x+3x
15=10x
x= [tex] \frac{15}{10} [/tex] = [tex] \frac{3}{2} [/tex]
Sper ca te-am ajutat!:)
