Question

Write an equation whose solution is $-7$.

Short answer

The required answer is $7x=-14$.

Step-by-step solution

Step 1. Determine the format of the equation

A variable with a coefficient 7 should be equal to double of 7 which is negative because the derived answer should be a negative number.

Step 2. Form the equation 

By using the obtained design of equation form the equation.

$7x=-14$

Step 3. Make the conclusion

Divide by 7 on both sides of the equation to determine the solution of the equation.

$\begin{array}{c}\frac{7x}{7}=-\frac{14}{7}\\ x=-7\end{array}$

As the solution of the formed equation is according to the provided solution then the equation$7x=-14$ is the required equation.