Question

1. (18 + x)2 = 30

Explanation:

Step1: Divide both sides by 2

To isolate the term with \( x \), we divide both sides of the equation \((18 + x) \times 2 = 30\) by 2. This gives us \(\frac{(18 + x) \times 2}{2}=\frac{30}{2}\), which simplifies to \(18 + x = 15\).

Step2: Subtract 18 from both sides

To solve for \( x \), we subtract 18 from both sides of the equation \(18 + x = 15\). So, \(18 + x - 18 = 15 - 18\), which simplifies to \(x = -3\).

Answer:

\(x = -3\)