Question

me ajudemm, por favor ​
obs: abram a imagem

Answer 1

Resposta:

$A)\frac{2}{4} =\frac{3}{x}$ ➳ $2.x = 3.4$ ➳ $2x = 12$ ➳ $x=12/2$ ➳ $x=6$

$B)\frac{4}{12} =\frac{x}{21}$ ➳ $x . 12 = 4.21$ ➳ $12x = 84$ ➳ $x=84/12$ ➳ $x=7$

$?)\frac{9}{x} =\frac{18}{4}$ ➳ $18.x=9.4$ ➳ $18x=36$ ➳ $x=36/18$ ➳ $x=2$

$?)\frac{10}{15} =\frac{3x+1}{5x-2}$ ➳ $15(3x + 1)=10(5x-2)$ ➳ $45x + 15 =50x - 20$ ➳ $45x - 50x = 20 - 15$ ➳ $-5x = 5.(-1)$ ➳$5x=-5$ ➳ $x=-5/5$ ➳ $x=-1$

$C) \frac{x}{14} =\frac{9}{12}$ ➳ $x.12=9.14$ ➳ $12x=126$ ➳$x=126/12$ ➳ $x=10,5$

$D)\frac{x}{12} =\frac{8}{9}$ ➳ $9.x = 8.12$ ➳ $9x=96$ ➳ $x=96/9$ ➳ $x=10,6$

(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧ Espero ter ajudado, Bons estudos ◕3◕