SIMILAR TRIANGLES
Solve for x.

Answer:
Step-by-step explanation:
There are several steps involved to solve this. I'll put each step separate so you can easily understand.
[tex]\frac{7}{7} =\frac{x}{12}[/tex]
7x = 7 x 12
7x = 84
x = 12
7 x 12 = 7 x 12
84 = 84 ✔
x = 12
I'm always happy to help :)