Question

solve 2x+y=-2 ; x-y=7​

Answer 1

Answer:

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Step-by-step explanation:

The four solutions of the equation 2x + y = 7 are (0, 7), (1, 5), (2, 3) and (-1, 9). (0, 9) is the solution.

Answer 2

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$2x \: + \: y \: = \: - 2 \\ x \: - \: y \: = \: 7 \\ - - - - - - - - - - \\ 3x \: = \: 5 \\ x = \: 5 \div 3$

x=5/3

putting x in eq. 2

5/3 - y = 7

5/3 - 7 = y

y = 5 - 21/3 = -16/3

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