Can someone explain to me how do to this algebra problem?

Question

Solve C = 2πr for r.

π is pi just in case you guys couldn't see it cause it was too close to the r

Answer 1

Divide each dide by 2(pi)

C/(2pi)=2(pi)r/(2pi))

C/(2pi)=r

Answer 2

C=2πr

C/2π=r

:))

Answer 3

r=C/2π

Answer 4

C = 2πr

just divide both sides by 2π

C / 2π = r