Question

calcule o valor x nas proporções...pfv​

Answer 1

Resposta:

- Basta multiplicar cruzado.

______________________ CÁLCULOS __________________________

$A)\frac{6}{x} =\frac{9}{12}$ ➳ $9.x=6.12$ ➳ $9x=72$ ➳ $x=72/9$ ➳ $x=8$

$B)\frac{2x}{3} =\frac{-24}{15}$ ➳ $2x . 15 = -24 . 3$ ➳ $30x=-72$ ➳  $x=-72/30$ ➳ $x=-2,4$

$C)\frac{3}{4} =\frac{5x}{20}$ ➳ $5x.4=20.3$ ➳ $20x = 60$ ➳ $x=60/20$ ➳ $x=3$

$D)\frac{x+5}{3} =\frac{x-1}{5}$ ➳ $5(x+1)=3(x-1)$ ➳ $5x+25=3x - 3$ ➳ $5x - 3x = -3 - 25$ ➳ $2x=-28$ ➳ $x=-28/2$ ➳ $x=-14$

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