Problem
Stacy is thinking of a number, which she calls \( n \). She triples it and then adds 10. (1) Write an expression to represent Stacy's final number. \[ 3 n+10 \] (1) What is Stacy's final number if her starting number is 12? \[ \begin{aligned} 3 n+10 & =3(12)+10 \\ & =\square+10 \end{aligned} \]
Solution
Step 1 ：3 n+10 = 3(12)+10
Step 2 ：= 36+10
Step 3 ：= 46
