Last month's electricity consumption was 220 kwh, and this month's electricity consumption was 310 kwh, totaling 46.8 yuan

Last month's electricity consumption was 220 kwh, and this month's electricity consumption was 310 kwh, totaling 46.8 yuan

If the unit price of electricity charge in the bill is x, then the electricity consumption in this month is 310-220 = 90 kwh, which can be listed as follows: (310-220) * x = 46.8
Then x = 0.52 yuan / kWh

Xiaoying's electricity consumption this month is 80 kwh, and the electricity fee is C yuan. How much is the electricity fee per kWh?

C divided by 80

In June, Aunt Wang's household electricity was 50 kwh, and the electricity charge was 26 yuan. Uncle Zhang's household electricity charge was 6.4 yuan. How many kwh did his family use in June? (use equation solution)

Suppose the unit price of electricity is x yuan, then 50x = 26, you can get x = 0.52 yuan, so Uncle Zhang's household electricity 6.4 / 0.52 = 1.23 kwh!

Xiaoming's electricity consumption was 80 kwh in April, 50% more than that in April. The electricity charge per kWh was 0.5 yuan. How much should Xiaoming pay in May?
fast

0.5×【80×（1+50%）】
=0.5×120
=60 yuan