**Answer**: D
Some triangles may have right angels but all triangles never have all 3 right angles
So the answer is D
Answer:
5
Step-by-step explanation:
4(x+3) is 4x+12
2x+22=4x+12
-2x from both sides
get 22=2x+12
-12 from both sides
get 10=2x
divide by 2 to both sides
get 5