Could someone help me with this problem

A weight of 20 kg is suspended from two strings of

length 10 cm and 12 cm, the ends of the strings being

attached to two points in a horizontal line, 15 cm apart.

Find the tension in each string.

Attachment 7791

The answer in the textbook is T1=14.99kg wt and T2=12.10kg wt, but i'm not sure how to get it. i tried finding the angles and then moving the vectors around but it wasn't right.