Question

3 A) x/3 = 8/12 B) 2,1/7 = x/10 C) 2/15 = 3/2x D) x+6/x-6 = 2/3 E) 1/5 = x-6/x+1,5 F) 3/4/1/3 = 1/2/x

Answer 1

$a) \frac{x}{3} = \frac{8}{12} \implies12x = 24\implies x = 2$

$b) \frac{x}{10} = \frac{2.1}{7} \implies7x = 21\implies x = 3$

$c) \frac{2}{15} = \frac{3}{2x} \implies4x = 45\implies x = \frac{45}{4}$

$d) \frac{x + 6}{x - 6} = \frac{3}{2} \implies3x - 18 = 2x + 12\implies x = 30$

$e) \frac{x - 6}{x + 1.5} = \frac{1}{5} \implies x + 1.5= 5x - 30\implies x = 7.125$

$f) \frac{ \frac{3}{4} }{ \frac{1}{3} } = \frac{ \frac{1}{2} }{x} \implies \frac{1}{6} = \frac{3x}{4} \implies18x = 4\implies x = \frac{2}{9}$