Question

Solve using the problem solving strategy for word problems. The difference of three times a number and ten is 20. Find the number.

Answer 1

Let the number be x

According to the statement,

`3x-10=20`

Solving it,

`\begin{gathered} 3x-10=20 \\ 3x=20+10 \\ 3x=30 \\ x=(30)/(3) \\ x=10 \end{gathered}`

Hence, the number is 10.