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Gavin Lynn
Mathematics
22 January, 06:44
Solve 7x - 2y = - 3
14x + y = 14
+2
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Regina Bartlett
22 January, 06:58
0
7x - 2y = - 3
14x + y = 14
14x - 14x + y = 14-14x
Y = 14 - 14x
7x - 2y = - 3
7x - 2 (14 - 14x) = - 3
7x - 28 + 28x = - 3
7x + 28x - 28 = - 3
35x - 28 = - 3
35x - 28 + 28 = - 3 + 28
35x = 25
35x/35 = 25/35
X = 25/35 = 5/7.
Y = 14 - 14x
Y = 14 - 14 (5/7)
Y = 14 - 10
Y = 4.
The solution P (5/7,4).
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