To solve for r in the equation J = (r - k) / x, you can isolate r by performing the following steps:
1. Start with the equation:
J = (r - k) / x
2. Multiply both sides of the equation by x to get rid of the fraction:
J * x = r - k
3. Add k to both sides of the equation to isolate r:
r = J * x + k
So, the equation solved for r is:
r = J * x + k