To solve this equality we are going to use the division property of equality, which says that you can divide both sides of the equality by the same number; notice that the number in question cannot be zero since you cannot divide by zero. In our case we are going to divide both sides by 4.5 to get rid of the 4.5 that is multiplying [tex]x[/tex]:
[tex]4.5x=18[/tex]
[tex] \frac{4.5x}{4.5} = \frac{18}{4.5} [/tex]
[tex]x= \frac{18}{4.5} [/tex]
[tex]x=4[/tex]
