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Mathematics, 16.10.2021 23:00 shatj960

Solve the following by substitution. Btw show your solution. 1. 7x - 4y = 5
8x + y = -11

2. 3x + 4y = -3
x + 4y = 1

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Solve the following by substitution. Btw show your solution. 1. 7x - 4y = 5
8x + y = -11
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