Basic Arithmetic : Linear Equations with Time
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Example Questions
Example Question #1 : Linear Equations With Time
It takes Sarah 
We can write a linear equation from the information given in the question:
Since Sarah has 15 problems, she has 3 sets of 5 problems.
Substituting that information gives the following equation:
Now, the question asks at what time Sarah will finish her algebra problems.
Now, add that to 3 pm.
Example Question #1 : Linear Equations With Time
It takes Daisy 
Let 
Given that she can plant 10 strawberry plants in an hour, Daisy can plant 
If she wants to plant 70 strawberry plants, then she will plant 
Dividing both sides by 10, we find that Daisy will take 
Example Question #2 : Linear Equations With Time
Two joggers start from the opposite end of a 
Let 
By the same logic, we know that the second jogger runs a distance of 
Since we are looking for the point at which the joggers meet up after running from opposite directions, we know that together they will have covered a total of 10 miles. Therefore:
Simplifying the equation:
Example Question #4 : Linear Equations With Time
Jimmy the handyman earns 
Let 
Dividing both sides by 30:
Example Question #1 : Linear Equations With Time
Francine wakes up at 
To solve this problem, you need to create a linear equation. First, you know that it takes two hours total for Francine to get to school. Two hours can also been translated into a hundred and twenty minutes. Second, you know that it only takes her twenty minutes to get ready. Your variable is the time it takes her to get to school.
So:
Therefore, 
Now we convert this back into hours and minutes.
Since 60 minutes is 1 hour it takes Francine an hour and fourty minutes to get to school.
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