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Mathematics
Erik Erickson
3 September, 02:33
Solve the matrix - 2+4y=12
-x+2y = - 12
+4
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Nobel
3 September, 05:48
0
-2 + 4y = 12 ⇒ - 2 + 4y = 12
-x + 2y = - 12 ⇒ - 2x + 4y = - 24
-2 + 2x = 36
+2 + 2
2x = 38
2 2
x = 19
-19 + 2y = - 12
+19 + 19
2y = 7
2 2
y = 3.5
-19 + 2 (3.5) = - 12
-19 + 7 = 12
-12 = - 12
(x, y) = (19, 3.5)
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