Question

43 = 20 + \frac{z}{3}

Explanation:

Step1: Isolate the fraction term

Subtract 20 from both sides.
$43 - 20 = 20 + \frac{z}{3} - 20$
$23 = \frac{z}{3}$

Step2: Solve for z

Multiply both sides by 3.
$23 \times 3 = \frac{z}{3} \times 3$

Answer:

$z = 69$