Question

Using cramers rule ,what is the value of x in the system of equations below? x+3y=16 3x+y=8

Answer 1

answer is A

Explanation:

Answer 2

Cramer's rule tells you that the value of x in the system of equations

`ax+by=c\\dx+ey=f`

is given by

`x=(ce-fb)/(ae-bd)`

For your equations, this evaluates to

`x=(16\cdot 1-8\cdot 3)/(1\cdot 1-3\cdot 3)=(-8)/(-8)\\\\x=1`