Problem
M.9 Solve two-step equations: complete the solution GK7 Learn with an example $\checkmark$ or Complete the process of solving the equation. Fill in the missing term on each line. Simplify any fractions. \[ \begin{aligned} 12 r+3 & =15 \\ 12 r & =\square \quad \text { Subtract } 3 \text { from both sides } \\ r & =\square \text { Divide both sides by } 12 \end{aligned} \] Submit
Solution
Step 1 ：Subtract 3 from each side of the equation to get \(12r = 15 - 3\).
Step 2 ：Simplify the right side of the equation to get \(12r = 12\).
Step 3 ：Divide each side of the equation by 12 to solve for r, \(r = \frac{12}{12}\).
Step 4 ：Simplify the right side of the equation to get \(r = 1\).
Step 5 ：So, the solution is \(\boxed{1}\).
