we know that
triangles BCD and ACE are similar
so, their ratios of sides must be equal
Calculation of y:

we can see that
AC=AB+BC
AC=y+3
CE=CD+DE
CE=4+6
CE=10
now, we can plug values

now, we can solve for y





Calculation of AC:
we know that
AC=y+3
we can plug y
and we get

...................Answer
Answer:
3 + 7x = 7x + 3
Step-by-step explanation:
Simplifying
7x + 3 = 7x + 3
Between two rational numbers there are an infinite number of irrational numbers.
Example:
The answer is A.
D= 6<=x<=11