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iliketorifk iliketorifk
wrote...
12 years ago
How do you solve this in elimination method??
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Smt Author
wrote...
12 years ago
y = 2x - 16

2x + 9(2x - 16) = 36
2x + 18x - 144 = 36
20x = 180
x = 9

y = 2 * 9 - 16 = 2
wrote...
12 years ago
2x + 9y = 36
2x - y = 16

The Augmented Matrix:

[ 2   9  |  36]
[ 2  -1  |  16 ]

[2  9    |  36 ]
[0  -10 | -20 ] row 2 Rightwards Arrow row 2 - row 1 (of the previous augmented matrix)

Hence -10y = -20
             y = 2

From row 1, 2x + 9y = 36
                   2x + 9(2) = 36
                        2x = 18
                           x = 9

Hope this helped.
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