Solve: x - 2 = 4

Answer: x = 6

Solve: x - 9 = -1

Answer: x = 8

Solve: 3 - x = 1

Answer: x = 2

Solve: 9 = 4 + x

Answer: x = 5

Solve: 100 = 10x

Answer: x = 10

Solve: 0 = 3 - x

Answer: x = 3

Solve: 3 - x = -1

Answer: x = 4

Solve: 3 - x = -4

Answer: x = 7