Which of the following equations have infinitely many solutions? Choose all answers that apply:

A
- 10x - 10 = -10x + 10

B
10x - 10 = -10x - 10

C
- 10x - 10 = -10x - 10

D
10x – 10 = -10x + 10

Given right triangle a w/a hypotenuse length of x+4 and a leg of x, and right triangle b, w/ a hypotense length of 3y and a leg length of y+4 for what values of x and y are the triangles congruent by hl?