Question

Edgar earns $12 per hour at his job during his weekdays. His hourly earning increased by 50% when he works during weekends. Edgar worked 20 hours this week on weekdays. What is minimum whole number of hours Edgar will have to work during this weekend in order to earn at least $400 this week?

Answer 1

Answer:
He worked for 10 more hours
Explanation:
20*12= 240
400-240= 160
16x=160 (x being the number of hours)
x=10 hours

Answer 2

In this exercise we want to calculate how many hours he worked extra to make the amount he earned, so we have to:

He worked for 10 more hours

To perform the calculation, we have a very simple way that will be the value of your salary multiplied by the amount of hours normally worked:

$20*12= 240$

And then we will subtract from your total, so:

$400-240= 160$

So now doing your division by what's left we find that:

$16x=160 \\x=10 hours$

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