Last month you made long-distance calls to two of your friends. One call lasted 8 min longer than the other. According to the phone bill,the two calls lasted a total of 42 min. How long was each call?
first call --- x minutes
second call -- x+8 minutes
solve:
x + x+8 = 42
35
To solve this problem, we can set up a system of equations based on the given information. Let's assume that the duration of one call is represented by "x" minutes.
According to the problem, the other call lasted 8 minutes longer than the first call. So, the duration of the second call would be "x + 8" minutes.
Now we need to find the values of "x" and "x + 8" that satisfy the total duration of the calls being 42 minutes.
The sum of the durations of the two calls is given as 42 minutes. So, we can write the equation:
x + (x + 8) = 42
Simplifying the equation, we get:
x + x + 8 = 42
2x + 8 = 42
Subtracting 8 from both sides, we have:
2x = 34
Finally, dividing both sides by 2, we get:
x = 17
So, the duration of the first call is 17 minutes.
Now, to find the duration of the second call, we add 8 to the duration of the first call:
x + 8 = 17 + 8 = 25
Therefore, the duration of the second call is 25 minutes.
In conclusion, the first call lasted 17 minutes, and the second call lasted 25 minutes.