Hey!
Let's write the problem.

Add like terms...

Add

to both sides.


Divide both sides by

.

Our final answer would be,

Thanks!
-TetraFish
Answer:
work is attached and shown
Answer:
Subtract 9 from each side of the equation
Step-by-step explanation:
m+9=-2
-9 -9
m=-11
AB is proportional to XY since they are similar triangles making it 25:10 or 5:2
so then AC:XZ would be 5x:2x and 5x:6 so then its 15:6 since x is 3 basically set up proportions and so value of the big triangle to the small triangle would be at rails os 5:2