If you're saying the circumference is 40 and we need the radius, then:

If you're saying the radius is 40 and we need the circumference, then:
Answer :
The required number is 2.
Step-by-step explanation:
Given : The sum of six fifths and six times a number is equal to four fifths subtracted from seven times the number.
To find : The number ?
Solution :
Let the number be 'x'.
The sum of six fifths and six times a number i.e. 
Four fifths subtracted from seven times the number i.e. 
According to question,




The required number is 2.
Answer:
No solution
Step-by-step explanation:
2(9x-5)=6(3x+4)
Step 1 is to do distributive property.
so you will get this:
18x-10=18+24
step 2 is combining like terms.
so you will subtract 24x from both sides.
(this:) 18x-10=18x+24
(into this:) -10=24
I got this because when you subtract 18 from 18 you will get zero (0).
So your answer will be:
No solution
64.9615207564689 is the answer to the full length.