Question

Find the value of $x$ for the following

(1)$\frac{2}{5}=\frac{8}{x}$

(2)$\frac{12}{x}=\frac{11}{8}$

(3)$\frac{x}{40}=\frac{11}{8}$

Answer 1

1) $\frac{2}{5}=\frac{8}{x}$

$2x=40$

$x=20$

2) $\frac{12}{x}=\frac{11}{8}$

$11x=96$

$x=\frac{96}{11}$

3) $\frac{x}{40}=\frac{11}{8}$

$8x=440$

$x=55$