Column equation: 0.88x = 0.8× 60+ 1.2 (x-60).

Solve the equation and get x = 75, 0.88 x = 66.

A: This user has to pay the gas bill in 66 yuan in May 438+10.

2. Solution: The share price before the rights issue is X yuan per share.

Column equation:15.5 (10+6) =10x+6× 5.

Solve the equation to get x = 2 1.8.

A: Before the rights issue, the share price was 265,438+0.8 yuan per share.