s + 7 r = 27 r = 3 What is the solution r , s to the given system

Question

s + 7 r = 27 r = 3 What is the solution r , s to the given system of equations?

Accepted Answer

Choice B is correct. The second equation in the given system is r = 3 . Substituting 3 for r in the first equation in the given system yields s + 7 3 = 27 , or s + 21 = 27 . Subtracting 21 from both sides of this equation yields s = 6 . Therefore, the solution r , s to the given system of equations is 3 , 6 . Choice A is incorrect. This is the solution s , r , not r , s , to the given system of equations. Choice C is incorrect and may result from conceptual or calculation errors. Choice D is incorrect and may result from conceptual or calculation errors.

Question s-7-r-