When M+N=8 and 2R+N=8, what is the value of R?
A.16 B.4 C.-4 D.-8 E. It cannot be determined from the information given.
Math - MathMate, Saturday, January 5, 2013 at 12:45pm
Subtract one equation from the other to get: R=M/2.
If there is no such option, decide which answer to choose.