Solve the equation using mental math.

$4 = \frac{36}{s}$

An equation is a mathematical statement that two expressions are equal. The solution of an equation is the value that when substituted for the variable makes the equation a true statement.

Example: 3x + 5 = 14 is an equation, in which 3x+5 and 14 are two expressions separated by an ‘’equal’’ sign.

Step 1: Simplify each side of the equation by removing parenthesis and combining the like terms.

Step 2: Use addition or subtraction to isolate the variable term on one side (preferably in the left side).

Step 3: Use Multiplication or Division to solve for the variable.

Now solving the equation $4 = \frac{36}{s}$with proper steps

$\begin{array}{l}4=\frac{36}{s}\\ 4·s=s·\frac{36}{s}\left[\text{multiplybothsideswith}s\right]\\ 4s=36\\ \frac{4s}{4}=\frac{36}{4}\left[\text{Divideeachsideby}4\right]\\ s=9\end{array}$

Solution of the equation is $s = 9$