\(\Rightarrow4:\left(x+9\right)=60\\ \Rightarrow x+9=\dfrac{4}{60}=\dfrac{1}{15}\Rightarrow x=\dfrac{1}{15}-9=-\dfrac{134}{15}\)
4:(x + 9) - 5 = 55
<=> 4:(x + 9) = 60
<=> x + 9 = 15
<=> x = 15 - 9
<=> x = 6
\(4:\left(x+9\right)-5=55\)
\(\Leftrightarrow4:\left(x+9\right)=55+5\)
\(\Leftrightarrow4:\left(x+9\right)=60\)
\(\Leftrightarrow x+9=4:60\)
\(\Leftrightarrow x+9=\dfrac{1}{15}\)
\(\Leftrightarrow x=\dfrac{1}{15}-9\)
\(\Leftrightarrow x=-\dfrac{134}{15}\)
4÷(x+9)-5=55
=)) 4÷(x+9)= 55+5
=)) 4÷(x+9)= 60
=)) x+9=60÷4
=))x+9=15
=))x= 15-9
=))x = 6
