If (x, y) is a solution to the system of equations, what is the value of x? 2x + 1/ 2 y = 2 1/ 2 x + 2y = 6
a)
4/17
b)
174
c)
4/15
d)
15/4

  C) 4/15

Step-by-step explanation:

The two equations ...

can be solved for x using Cramer's rule:

  x = (2·2 -1/2·6)/(2·2 -1/2·1/2) = (4-3)/(4-1/4) = 1/(15/4)

  x = 4/15

Cramer's rule for the solution to ...

is ...

14

step-by-step explanation:

14 x 3 = 42