Question

ajuda ae por favorrrrrre manooooooo
(CALCULOOO)​

Answer 1

Usaremos o Teorema de Tales para resolver:

A) $\frac{x}{3}=\frac{4}{2}$

$\frac{x}{3}=2$

$x=2.3$

$x=6$

B) $\frac{x}{21}=\frac{4}{12}$

$\frac{x}{21}=\frac{1}{3}$

$x=\frac{1}{3}.21$

$x=\frac{21}{3}$

$x=7$

C) $\frac{x}{4}=\frac{9}{18}$

$\frac{x}{4}=\frac{1}{2}$

$x=\frac{1}{2}.4$

$x=\frac{4}{2}$

$x=2$

D) $\frac{x+1}{8}=\frac{2x-6}{12}$

$\frac{x+1}{8}=\frac{x-3}{6}$

$6(x+1)=8(x-3)$

$6x+6=8x-24$

$6x-8x=-24-6$

$-2x=-30$

$2x=30$

$x=\frac{30}{2}$

$x=15$