That triangle would be right triangle. :) :)
HAPPY TO HELP
Answer:
x = - 4
Step-by-step explanation:
First do distributive property
5x-15=10x+5
then add 15
5x=10x+20
-10x
-5x=20
divide 5
x=-4
this picture will explain you
the answer is 10
If its on a graph just look for the spot where the line meets the y and x-axis