(2) Just 100 kwh electricity needs to pay more 100 x 0.5 = 76-50 in 50 yuan = 26 yuan, that is, 26÷0.65=40 kwh.
So this month * * * used 100+40= 140 degrees.
If the monthly electricity consumption exceeds 200 kWh, assuming that the electricity consumption is T kWh, the electricity fee should be paid.
100 x 0.5+(200- 100)x 0.65+(t-200)x 0.75
=50+65+0.75t- 150
=0.75t-35