Question

Aflati numerele rationale pozitive necunoscutedin proportiile: 1.  2+1 supra 3 - 5 supra 6 totul supra 3= x supra 2       si     2.     0,3 supra 0,4=1,35 supra 0,3x 

Answer 1

$a) \frac{2+ \frac{1}{3}- \frac{5}{6} }{3}= \frac{ \frac{12+2-5}{18} }{3} = \frac{ \frac{9}{18} }{3}= \frac{1}{6}= \frac{x}{2} =>x= \frac{2}{6}= \frac{1}{3}$
$b) \frac{0,3}{0,4} = \frac{1,35}{0,3*x} =>x= \frac{1,35*0,4}{0,3*0,3} = \frac{0,54}{0,09}=6$