Question

The circumference of a circle is 29x inches. Find the radius.

Step 2 of 3: Without substitution, solve the formula for the unknown variable in terms of the known variables.

Answer 1

r =
`(29x)/(2\pi )`

x =
`(2\pi r)/(29)`

Explanation:

C = 2
`\pi`r

29x = 2
`\pi`r --------- (i)

divide both sides of (i) by 2
`\pi`

r =
`(29x)/(2\pi )`

but when you divide both sides of (i) by 29, you get

x =
`(2\pi r)/(29)`