×+8=18 ×-3=7 47-×=40 50-×=40 ×-8=2 ×+3=13

Let's solve each equation step by step:

1. \( x + 8 = 18 \)

   Subtract 8 from both sides: \[ x = 18 - 8 \\ x = 10 \]

2. \( x - 3 = 7 \)

   Add 3 to both sides: \[ x = 7 + 3 \\ x = 10 \]

3. \( 47 - x = 40 \)

   Subtract 40 from both sides: \[ 47 - 40 = x \\ x = 7 \]

4. \( 50 - x = 40 \)

   Subtract 40 from both sides: \[ 50 - 40 = x \\ x = 10 \]

5. \( x - 8 = 2 \)

   Add 8 to both sides: \[ x = 2 + 8 \\ x = 10 \]

6. \( x + 3 = 13 \)

   Subtract 3 from both sides: \[ x = 13 - 3 \\ x = 10 \]

Summary of Solutions:

1. \( x = 10 \)
2. \( x = 10 \)
3. \( x = 7 \)
4. \( x = 10 \)
5. \( x = 10 \)
6. \( x = 10 \)

Most of the equations result in \( x = 10 \), except for the third one, which gives \( x = 7 \).