Question

va rog ajutor :( mulțumesc (doar 4)

Answer 1

4) x=?
$\frac{x+2}{x} = \frac{9}{2}$
==> 9x=2(x+2)
9x=2x+4
9x-2x=4
7x=4
x=$\frac{4}{7}$

5)x=?
$\frac{5}{5-x} = \frac{3}{7}$
==>(5-x)3=7x
15-3x=7x
15=7x+3x
15=10x
x= $\frac{15}{10}$ = $\frac{3}{2}$
Sper ca te-am ajutat!:)