One-step equations

Answer: 6

1. Subtract 6 from both sides: x=6.
2. Check in the original equation: 1×(6)+6=12.

Answer: 12

1. Subtract 10 from both sides: x=12.
2. Check in the original equation: 1×(12)+10=22.

Answer: 5

1. Subtract 8 from both sides: x=5.
2. Check in the original equation: 1×(5)+8=13.