/kloc-96 yuan for gas in 0/2 months, with gas consumption of 96/x.
The gas consumption in May is less than that in February last year 10 cubic meter, and the gas consumption in May is 96/x- 10.
The gas bill in May is 90 yuan, (96/x-10) * x (1+25%) = 90, and the result is X=2.4 yuan.
Therefore, the residential natural gas price is 2.4 yuan per cubic meter, and the adjusted natural gas price is 2.4( 1+25%)=3 yuan.