write four solution for each of the following equations 2x + Y is equal to 7
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x can be 3 and y can be 1
x can be 2 and y can be 3
x can be 1 and y can be 5
x can be 4 and y can be (-1)
x can be 2 and y can be 3
x can be 1 and y can be 5
x can be 4 and y can be (-1)
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