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Content type
User Generated
Subject
Algebra
Type
Homework
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Question:
3x-y=7 - y = 7
9x - 3y = 21
Solution:
Arranging the equation into matrix form
39
13
y
x
=
21
7
R
2
R
12
*3 R
30
13
y
x
=
0
7
1
R
R
30
03
y
x
=
0
7
Result:
0
3
7
=
=
y
x
03
73
=
=
y
x

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Question: 3x-y=7 - 9x - 3y = 21 Solution: Arranging the equation into matrix form 3 − 1  x   7  9 − 3  y  = 21      R 2 →R 2 −3 * R1 3 − 1  x  7  0 − 3  y  =  0       1 R1 ...
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