Question

15: ( x +2 ) = ( 3³ +3 ) : 10

Answer 1

  

Answer 2

15: ( x +2 ) = ( 3³ +3 ) : 10

15:(x+2)=3

x+2=5

x=3

Answer 3

\(\dfrac{15}{x+2}=\dfrac{3^3+3}{10}\\ \Leftrightarrow\dfrac{15}{x+2}=\dfrac{27+3}{10}\\ \Leftrightarrow\dfrac{15}{x+2}=\dfrac{30}{10}\\ \Leftrightarrow\dfrac{15}{x+2}=3\\ \Leftrightarrow x+2=\dfrac{15}{3}\\ \Leftrightarrow x+2=5\\ \Leftrightarrow x=5-2\\ \Leftrightarrow x=3\)