rewrite the equations as matrices, -19x=-4y+12, and 4y=-3x+100

Question

Use Cramer's Rule to solve the matrices. Show all your calculation.

 

Answer 1

Given first equation -19x = -4y+12

Add 4y to each side.

-19x+4y = -4y+4y+12

-19x+4y = 12 ------> (1)

Second equation is 4y = -3x+100

Add 3x to each side.

4y+3x = -3x+3x+100

3x+4y = 100 -------> (2)

Convert the equations into matrix form.