+561 \(\frac{f}{r^2}+a=n+k\)
Subtract a from each side.
\(\frac{f}{r^2}=n+k-a\)
Multiply each side by r^2.
\(f=(n+k-a)\times r^2\)
Divide each side by (n+k-a).
\(\frac{f}{n+k-a}=r^2\)
And then take the square root of each side, and you get an equation equal to r.
I'll leave this last step for you to do.
+561 \(\frac{f}{r^2}+a=n+k\)
Subtract a from each side.
\(\frac{f}{r^2}=n+k-a\)
Multiply each side by r^2.
\(f=(n+k-a)\times r^2\)
Divide each side by (n+k-a).
\(\frac{f}{n+k-a}=r^2\)
And then take the square root of each side, and you get an equation equal to r.
I'll leave this last step for you to do.
