Question

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

Answer 1

Solution:

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

$\begin{gathered} 3x-30=0 \\ 3x-30+30=0+30 \\ 3x=30 \\ \frac{3x}{3}=\frac{30}{3} \\ x=10 \end{gathered}$

Hence,

The value of x is

$\Rightarrow x=10$