September 2018 1 64 Report
 \left[\begin{array}{ccc}1&1\\a&2\end{array}\right] dikali  \left[\begin{array}{ccc}x\\y\\\end{array}\right] = \left[\begin{array}{ccc}8\\4\\\end{array}\right]

jika determinan  \left[\begin{array}{ccc}1&1\\a&2\\\end{array}\right] = 1

tentukan nilai x dan y



mohon di bantu utk pembuktian apakah jawaban saya benar atau salah ..

a = 1 x dan y nya nggak tau ..

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