18-05-2016
Mathematics

contestada

Ben is 3 times as old as Daniel and is also 4 years older than Daniel.
How old is Ben?

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18-05-2016

B=ben age
D=daniel age

B is 3 times D
B=3D

B is 4 older than D
B=4+D

3D=B=4+D
3D=4+D
minus D both sides
2D=4
divide 2
D=2
sub

B=3D
B=3(2)
B=6

ben is 6 years old

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