The given equation is
9x - 2c = k
We would solve for x by making x the subject of the formula. The first step is to add 2c to both sides of the equation. It becomes
9x - 2c + 2c = k + 2c
9x = k + 2c
We would divide both sides of the equation by 9. It becomes
9x/9 = (k + 2c)/9
x = (k + 2c)/9
