Question

3(x-3)-21=0how would i solve this

Answer 1

The equation is given below as

`3(x-3)-21=0`

Step 1:

Open up the parenthesis using the distributive law

`\begin{gathered} 3(x-3)-21=0 \\ 3(x)-3(3)-21=0 \\ 3x-9-21=0 \\ 3x-30=0 \end{gathered}`

Step 2:

Add 30 to both sides

`\begin{gathered} 3x-30=0 \\ 3x-30+30=0+30 \\ 3x=30 \\ (3x)/(3)=(30)/(3) \\ x=10 \end{gathered}`

Hence,

The value of x is

`\Rightarrow x=10`