Question

Solve each equation.

$0=21+3x$

Short answer

The required solution is represented by$x=-7$.

Step-by-step solution

Step 1. Determine the method which can be used to determine the required solution.

The equation that represents the value of x will represent the required solution.

Step 2. Determine the value of x.

Perform subtraction of 21 on both sides of the provided equation.

$$\begin{gathered} -21=21+3x-21 \\ -21=3x \end{gathered}$$

Perform division of 3 on both sides of the equation.

$\begin{array}{c}\frac{-21}{3}=\frac{3x}{3}\\ -7=x\\ x=-7\end{array}$

Step 3. Write the conclusion.

The obtained equation$x=-7$ is the required solution.