Answers

  • ysv
  • Helping Hand
2015-06-26T21:21:13+05:30
Present age = x
after four years = 4x
after 15 years = 15
x+4x=15
5x=15
x=15÷5
x=3
0
2015-06-26T21:42:54+05:30
X+15=4x
3x=15
x=5
Mary is 5 years old
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