15.21 is the answer :)
Answer:
15.21
Step-by-step explanation:
c
BCD = ECD
they would equal the same thing because it is still the same shape
In form ax + b = c: 2x - 8.4 = 5
Solution to equation: x = 6.7
4x - 8.4 = 2x + 5
2x - 8.4 = 5
2x = 13.4
x = 6.7
look at the picture i have sent