Answer:
34 minutes
Step-by-step explanation:
Given
[tex]Time\ Spent = 6[/tex]
[tex]Phone\ Calls = 40[/tex]
Required
Number of minutes left to spend (x)
Since there's only 1 minute left to spend on every other call;
Time left = x * 1
Time left = x
The required can further be calculated using:
[tex]Time\ Spent + Time\ Left = Phone\ Calls[/tex]
This gives:
[tex]6 + x = 40[/tex]
Subtract 6 from both sides
[tex]x = 40 - 6[/tex]
[tex]x = 34[/tex]
Hence, there are 34 minutes left to spend