Question

Rezolvati in multimea Q ecuatia: IN TOATE CAZURILE X-URILE SUNT NECUNOSCUTE! Dau coroana

Answer 1

Răspuns:

Explicație pas cu pas:

$a) \frac{2}{3} x=46\\\frac{2x}{3} =46|*3\\2x=138|:2\\x=69$

$b)\frac{1}{5} x-1.3=1|+1.3\\\frac{x}{5} =2.3|*5\\x=11.5$

$c)\frac{3,6}{x} =1.2|*x\\3.6=1.2x\\1.2x=3.6|:1.2\\x=3$

$d)1-\frac{1}{5} x=0.5\\\frac{5-x}{5} =0.5|*5\\5-x=2.5\\5-2.5=x\\x=2.5$

$e)5-2x=-2.6|-5\\-2x=-7.6|:-2\\x=3.8$

Succes! :)