Answer: 8
Step-by-step explanation:
12-4= 8
*8 is the length of the side because of this theory I forgot, but yeah!
Answer:
x = 18
Step-by-step explanation:
Since both right triangles are similar, therefore:

Cross multiply




Subtract 780 from both sides





x + 23 = 0
x = -23
Or
2x - 36 = 0
2x = 36
x = 18
You disagree because you cannot write that number as a fraction since there is no number in the ones place when it is solved and turned into a decimal.