Using cramer’s rule, what is the value of x in the system of linear equations below?

The answer is the 1st

Step-by-step explanation:

Lets revise the Cramer's rule

- If the system of equation is ax + by = c and dx + ey = f

- A is the matrix represent this system of equation

- The first column has the coefficients of x, and

  the second column has the coefficients of y

∴ A =

- Ax means replace the column of x by the answers of the equation

∴ Ax =

- Ay means replace the column of y by the answers of the equation

∴ Ay =

- x = Dx/D, where Dx is the determinant of Ax and D is the determinant

 of A

- The determinant of A = ae - bd

- The determinant of Ax = ce - bf

* Now lets solve the problem

∵ x + 3y = 16 and 3x + y = 8

∴ A =

- Replace the column of x by the answer to get Ax

∴ Ax =

∵

∵ Dx =

∵ D =

∴ x =

* x =

step-by-step explanation:

1. the cylinder is a. 54

2.   a.108 /