Question

Trình bày rõ ràng và nhanh giúp mik nhé

Answer 1

\(\Rightarrow12+20x-60=45x-15\Leftrightarrow25x=-33\Leftrightarrow x=-\dfrac{33}{25}\)

Answer 2

12+20x−60=45x−15

25x=−33

x=−\(\dfrac{33}{25}\)

 

Answer 3

\(\dfrac{3+5x}{5}-3=\dfrac{9x-3}{4}\)

\(\Leftrightarrow\dfrac{5x-12}{5}=\dfrac{9x-3}{4}\)

\(\Leftrightarrow20x-48=45x-15\)

\(\Leftrightarrow25x=-33\)

\(\Leftrightarrow x=-\dfrac{33}{25}\)