Question

1. $8 + x = 12$
2. $10 = 5x$

Explanation:

For problem 5: \( 8 + x = 12 \)

Step1: Isolate \( x \) by subtracting 8

Subtract 8 from both sides: \( 8 + x - 8 = 12 - 8 \)

Step2: Simplify both sides

Left side: \( x \), Right side: \( 4 \)

Step1: Isolate \( x \) by dividing by 5

Divide both sides by 5: \( \frac{10}{5} = \frac{5x}{5} \)

Step2: Simplify both sides

Left side: \( 2 \), Right side: \( x \)

Answer:

\( x = 4 \)

For problem 7: \( 10 = 5x \)