One way is to:
First, multiply 2 by the term inside the parenthesis.
Second, add eleven on both sides.
Third, divide using 4x on both sides.
This will give you your first method.
Answer:
1
Step-by-step explanation:
I guessed on the problem and it was right
Let's take a look at the exponent rule:

Her mistake was she multiplied the exponents instead of adding it up.
Answer: The triangles are reflected across the line y = x
Step-by-step explanation:
I used wolfram to calculate it for me. I used the bottom right point of the triangle.