What is the value of x?

A triangle has a segment parallel to the bottom side dividing the left side into segments measuring 12 and 16, from top to bottom and right side into segments measuring x - 3 and x, from top to bottom.

DO NOT GIVE ME THE ANSWER, I AM NOT LOOKING TO CHEAT. I AM LOOKING FOR DIRECTIONS ON HOW TO SOLVE IT

4 answers

NEVERMIND, I THINK I CAN FIGURE IT OUT ON MY OWN
again nevermind i have no idea what im doing
well, you know that the small top triangle and the whole triangle are similar, so
(x-3)/(x + x-3) = 12/(12+16)
28(x-3) = 12(2x-3)
x = 12

Not sure what else you wanted to know ...
already completed this, ignore