Question

in an examination Ramesh scored 15 more than Gurudas whereas leeala score 7 marks less than Gurudas in the same examination if their total scored is 83, find the marks scored by Gurudas.

Answer 1

let the marks scored by gurudas be x
then Ramesh's marks= x+15
Leela's marks = x-7
therefore total marks =
x+x+15+x-7=83
3x+8=83
3x=83-8
3x=75
$x = \frac{75}{3} \\ x = 25$
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Answer 2

from here I confused