Question

solve the equation $12 + z = 45$. what is the value of $z$? $\

$$\begin{align*} 12 + z &= 45 \\\\ - 12 \\quad \\quad \\quad &- 12 \\quad \\longleftarrow \\text{subtract 12 on both sides.} \\\\ z &= \\square \\end{align*}$$

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Explanation:

Step1: Subtract 12 from both sides

We start with the equation \(12 + z = 45\). To isolate \(z\), we subtract 12 from both sides of the equation. This gives us \(12 + z - 12 = 45 - 12\).

Step2: Simplify both sides

Simplifying the left side, \(12 - 12 + z = z\). Simplifying the right side, \(45 - 12 = 33\). So we get \(z = 33\).

Answer:

33