she got 5 marks more than he in a test. If the total marks secured by them is 15, how many marks did she get?
Answers
Answered by
6
Step-by-step explanation:
hello here is your answer
Attachments:
Answered by
1
Answer:
- Let her marks be x and that of his marks be y
- Therefore,x=y+4 eqn1
- x+y=15. eqn2
- Subtracting eqn1 from eqn2
- (x+y)-(x-y)=15-4
- x+y-x+y=11
- 2y=11
- y=11/2
- Substituting y=11/2 in eqn1
- x=11/2+4
- x=11-8/2
- x=3/2
- (x,y)=(11/2,3/2)
Similar questions