Asked by Kabdul
can someone please help me solve this question?
I tried so many times but I still could not get it...
x + y = 7
2x - y = 5
its supposed to start as
[1 1 | 7]
[2 -1 | 5].....
and the ans is supposed to be (4,3)
thanks in advance
much appreciated
I tried so many times but I still could not get it...
x + y = 7
2x - y = 5
its supposed to start as
[1 1 | 7]
[2 -1 | 5].....
and the ans is supposed to be (4,3)
thanks in advance
much appreciated
Answers
Answered by
TP
I think its
[ 1 1 | 7]
[ 0 3 | 9] R2->2R1 - R2
0x+3y=9
y=3
Sub that into x+y=7
x+3=7
x=4
Therefore, (4,3)
[ 1 1 | 7]
[ 0 3 | 9] R2->2R1 - R2
0x+3y=9
y=3
Sub that into x+y=7
x+3=7
x=4
Therefore, (4,3)
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