Question

The sum of $7$ and a number$y$ is$12$. Find the number $y$

Answer 1

Step 1 Finding the algebraic expression

The algebraic expression is $7+y=12$

Step 2 Finding the number $y$ of algebraic expressions

$$\begin{gathered} 7+y=12 \\ \Rightarrow y=12-7 \\ \Rightarrow y=5 \end{gathered}$$

Hence, the number $y$ is $5$