Question

27 = \frac{s}{3} + 21\
s = \underline{\quad\quad}

Explanation:

Step1: Isolate the fraction term

Subtract 21 from both sides.
$27 - 21 = \frac{x}{3}$

Step2: Simplify left-hand side

Calculate the difference.
$6 = \frac{x}{3}$

Step3: Solve for x

Multiply both sides by 3.
$x = 6 \times 3$
$x = 18$

Answer:

$x = 18$