Geometry (Triangle Medians)

[Zimed]

I need help with this problem, it is very confusing to me, can anyone help, and explain how to?

 

Thanks.

 

http://img186.imageshack.us/img186/3112/gfgfgyc6.jpg

 

And another problem, very related to this one is this.

 

http://img241.imageshack.us/img241/7311/anotherproblemol7.jpg

[EvoN1020v]

Median in another word, is midpoint. In the first diagram, the line BD touches the midpoint of line AC.

[Zimed]

So, to I set the two values, on line AC equal to one another, to solve to get the value of X? Or what do I do? Thank you for clarifying.

[the tree]

By Evo's definition, the two expressions are equal to each other, yes. Honestly, I'm a bit confused by it, I can't work out what on earth (15x+42) is pointing to.

[Zimed]

It is pointing towards...I believe the angle right above line AC...but this is a guess as well, as it is quite unclear.

[EvoN1020v]

You perhaps can assume that [math]15x+42[/math] is the equation for the length of line BD.

[babu_ipsita]

10x-7=5x+3

or, x=2

no other information is needed.