P = N 19 - C The given equation relates the positive numbers P , N , and C .

Question

P = N 19 - C The given equation relates the positive numbers P , N , and C . Which equation correctly expresses C in terms of P and N ?

Accepted Answer

Choice D is correct. It's given that the values of P , N , and C are positive. Therefore, dividing each side of the given equation by N yields P N = 19 - C . Subtracting 19 from each side of this equation yields P N - 19 = - C . Dividing each side of this equation by - 1 yields 19 - P N = C , or C = 19 - P N . Choice A is incorrect. This equation is equivalent to P = N C - 19 , not P = N 19 - C . Choice B is incorrect. This equation is equivalent to P = 19 - N C , not P = N 19 - C . Choice C is incorrect. This equation is equivalent to P = N C - 19 , not P = N 19 - C .

Question p-n-19