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12-01-2017
Mathematics

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Solve the system of linear equations by elimination

x - y = 4
x + y = 2

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Аноним Аноним

12-01-2017

x - y = 4
x + y = 2
---------------add
2x = 6
x = 3

x - y = 4
3 - y = 4
y = 3 -4
y = -1

solution (3,-1)

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