Question

1. \\( \frac{x + 9}{3} = 20 \\)

Explanation:

Step1: Eliminate denominator (multiply by 3)

$$\frac{x+9}{3} \times 3 = 20 \times 3$$
$$x+9 = 60$$

Step2: Isolate x (subtract 9)

$$x+9 - 9 = 60 - 9$$
$$x = 51$$

Answer:

$x=51$