Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 4 | E Maths
No Answers Yet
Help Cynthia ! Anyone can contribute an answer, even non-tutors.
May I ask how to do this question?
Date Posted: 6 years ago
Views: 304
Let micheal’s present age is M and Ethan present age is E
In 2 years time
M+2 = 2(E+2)
M=2E + 2 : eqn 1
In 5 years,
M+5 + E+5 =x
M+E+10 =x: eqn 2
Substituting eqn 1 in 2,
2E +2 +E +10 =x
3E = x-12
E = (x-12)/3
M = 2 ((x-12)/3) +2 —> 3M= 2x-24 +6
M = 2/3 x - 6
In 2 years time
M+2 = 2(E+2)
M=2E + 2 : eqn 1
In 5 years,
M+5 + E+5 =x
M+E+10 =x: eqn 2
Substituting eqn 1 in 2,
2E +2 +E +10 =x
3E = x-12
E = (x-12)/3
M = 2 ((x-12)/3) +2 —> 3M= 2x-24 +6
M = 2/3 x - 6
360 Tutoring Program