Five times a number added to 10 is 20. What is the number

Question

Determine the correct equation and the unknown number in this situation.

Answer 1

Let's denote the unknown number as \( x \).

According to the problem, five times this number added to 10 equals 20. We can write this as an equation:

\[ 5x + 10 = 20 \]

Now, let's solve for \( x \).

1. Subtract 10 from both sides: \[ 5x + 10 - 10 = 20 - 10 \] This simplifies to: \[ 5x = 10 \]

2. Now, divide both sides by 5: \[ x = \frac{10}{5} \] This simplifies to: \[ x = 2 \]

So, the unknown number is \( \mathbf{2} \).