For the equations 2x + 3y = 8 and 4x - y = 6, what is the value of x using Cramer's rule?
Correct answer: C. 13/7
- A. 5/7
- B. 9/7
- C. 13/7
- D. 15/7
Explanation
The coefficient determinant is 2(-1) minus 3(4), which equals -14. Replacing the x-column gives a determinant of 8(-1) minus 3(6) = -26, so x = (-26)/(-14) = 13/7.
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