Which of the choices below constitutes a simultaneous solution to these equations?
A)x = 2, y = .5
B)x = 4, y = -.5
C)x = 2, y = 1
D)x = y
E)y = 2x

Question

Which of the choices below constitutes a simultaneous solution to these equations? 
A)x = 2, y = .5 
B)x = 4, y = -.5 
C)x = 2, y = 1 
D)x = y 
E)y = 2x

Quizplus · Accepted Answer

From the first equation, we know that x = 2y. Substituting this into the second equation, we get 3(2y) - 4y = 2, which simplifies to y = 1. Substituting y = 1 back into the first equation, we get x = 2. Therefore, the simultaneous solution is x = 2, y = 1, which is choice C.

Which of the Choices Below Constitutes a Simultaneous Solution to These