DribleDaVaca19
Which matrix equation can be used to solve the system? Will draw it.



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DribleDaVaca19
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dw:1370965723891:dw

amistre64
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Ax = b
x = A^(1) b might be one of the options

amistre64
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they was nice enough to give you a determinant of 1 ... how sweet

DribleDaVaca19
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i have 4 answers

amistre64
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the answers might help us determine a suitable soluton process

DribleDaVaca19
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dw:1370966096557:dw

amistre64
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ax + by = n
cx + cy = m
matrix A = a b
c d
vector b = n
m
so yeah, they are looking for an inverse setup

DribleDaVaca19
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dw:1370966191827:dw

amistre64
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do you recall how to find the inverse of a 2x2 matrix?

amistre64
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the shorcut involves a swap and some negations, youll also need a determinant

DribleDaVaca19
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never mind I found it out, thx anyways

amistre64
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\[\begin{pmatrix}a&b\\c&d\end{pmatrix}^{1}=\begin{pmatrix}d/A&b/A\\c/A&a/A\end{pmatrix}\]