In a certain week , the amount of time lisa spent on watching television was 3 hours more than twice the time she spent on doing her mathematics homework. If the total time she spent on these two activities was 30 hours in that week, how many hours did lisa spend on doing her mathematics home work?
Answers
Given : In a certain week , the amount of time lisa spent on watching television was 3 hours more than twice the time she spent on doing her mathematics homework. total time she spent on these two activities was 30 hours in that week,
To Find : how many hours did lisa spend on doing her mathematics home work?
Solution:
lisa spent on doing her mathematics home work = M hrs
the amount of time lisa spent on watching television was 3 hours more than twice the time she spent on doing her mathematics homework.
lisa spent on watching television = 2M + 3 hrs
Total time spent on these two activities = M + 2M + 3
= 3M + 3 hrs
3 M + 3 = 30
=> 3M = 27
=> M = 9
lisa spent on doing her mathematics home work = 9 hrs
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