Question

calculați (3•X-5):4+(275-2•30):5=53va rog repede!!!!!!

Answer 1

Rezolvarea cea mai rapida a acestei ecuații cu necunoscuta x se face efectuând operațiile in ordine "inversa"
[tex](3*x-5):4+(275-2*30):5=53 \ \textless \ =\ \textgreater \ \frac{(3*x-5)}{4} + \frac{(275-2*30)}{5} =53[/tex]
$\frac{(3*x-5)}{4} = 53-\frac{275-60}{5} \ \textless \ =\ \textgreater \ \frac{(3*x-5)}{4} = 53- \frac{215}{5}\ \textless \ =\ \textgreater$
$\frac{(3*x-5)}{4} = 53-43 \ \textless \ =\ \textgreater \ \frac{(3*x-5)}{4} = 10 \ | *4 =\ \textgreater \ 3*x-5=40 \ | +5 =\ \textgreater$
$3*x-5+5=40+5\ \textless \ =\ \textgreater \ 3*x=45 \ |:3 =\ \textgreater \ \frac{3*x}{3} = \frac{45}{3} =\ \textgreater \ x=13$
Sper sa-ti fie utila schița asta.