Let's solve the equation:
[tex]0.4(x-7)=18[/tex]First, let's divide both sides by 0.4 :
[tex]0.4(x-7)=18\rightarrow\frac{0.4(x-7)}{0.4}=\frac{18}{0.4}\rightarrow x-7=45[/tex]Now, we'll add 7 to both sides:
[tex]\begin{gathered} x-7=45\rightarrow x-7+7=45+7 \\ \\ \Rightarrow x=52 \end{gathered}[/tex]This way, we can conclude that x is 52
