First subtract the 7 from both sides and that would equal 2x+9=2x then subtract 2x and the answer is 9
Answer:

Step-by-step explanation:
The given interval : x = 0 to x = 10
Length of interval = 10 - 0
= 10

⇒ Number of equal intervals = 5


Answer:
BD = 4.99
Step-by-step explanation:
You can simply use the trigonometric identity tangent to solve for length BD.
Tan = opposite/adjacent
In this case we have,
Tan 31 = 3/BD
BD = 3/Tan 31
BD = 4.99
3x+4=52
-4 -4
3x=48
divide by 3 on both sides
x=16