How to solve the equation ax-x=c? solve for x. explain the process because i have a solution but i don't understand how to get it.

(9x-5) - (x+12) what’s the answer and also explain how to do it i need it for a test tomorrow

After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?