Question

de o valor do x ????

Answer 1

vamos lá...

$\frac{2}{x+2} = \frac{8}{6x+2} \\ \\ 2(6x+2)=8(x+2) \\ \\ 12x+4=8x+16 \\ \\ 12x-8x=16-4 \\ \\ 4x=12 \\ \\ x=12\div4 \\ \\ x=3 \\ -------------- \\ \\ \frac{x}{x+3} = \frac{4}{9} \\ \\ 9x=4(x+3) \\ \\ 9x=4x+12 \\ \\ 9x-4x=12 \\ \\ 5x=12 \\ \\ x= \frac{12}{5} ~~~ou~~~x=2,4$