Maths
posted by Zayn .
The ratio of the amount of money Karen had to the amount of money Peter had was 2:5. Peter received $75 from his mother, the ratio became 4:15. How much money did each person have at first?

Karen had 2x
Peter had 5x
after mom's gift
Karen  2x
Peter  5x+75
2x/(5x+75) = 4/15
30x = 20x + 300
10x = 300
x = 30
Karen had 60
peter had 150
check:
Karen still has 60 , Peter has 225
60:225 = 4:15 
is the answer Karen: $105?
please answer or im shutting down this website 
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Is 1 unit 15?