Question

you earn $70 per week mowing lawns one week you work 10 hours during the week and spend $20 on gasoline for your mower how much do you earn each hour

Answer 1

Total income is $70/week.  $20 of that goes towards the cost of gas.  Thus, the net earnings were $50 for the week.

$50
-------------------  =  $5 per hour
    10 hours