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Please help I have no idea how to do this problem: Use Cramer's Rule to solve each system.

0 votes
1. 2x+y=4
3x-y=6
2. 2x+3y+ z= 5
x+y-2z= -2
-3x +z=-7
asked Mar 17, 2014 in ALGEBRA 2 by payton Apprentice

2 Answers

0 votes

Cramer's rule

2) Given equations are 2 + 3y  + = 5 ---> (1)

+ - 2z  = -2 ---> (2)

-3x  + z  = -7 ---> (3)

Write the equations into matrices form AX  = B .

is Coefficient matrix , is variable matrix and is Constant matrix.

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Solution

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answered Mar 21, 2014 by david Expert
0 votes

Cramer's rule

1) Given equations are 2 + y   = 4 ---> (1)

3 -   = 6 ---> (2)

Write the equations into matrices form AX  = B .

is Coefficient matrix , is variable matrix and is Constant matrix.

image

image

image

image

image

image

image

image

Solution :

image

answered Mar 21, 2014 by david Expert

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