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Question
Write four solutions for the following equation:
2x + y = 7
Sum
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Solution
2x + y = 7
For x = 0,
2(0) + y = 7
⇒ y = 7
Therefore, (0, 7) is a solution of this equation.
For x = 1,
2(1) + y = 7
⇒ y = 5
Therefore, (1, 5) is a solution of this equation.
For x = −1,
2(−1) + y = 7
⇒ y = 9
Therefore, (−1, 9) is a solution of this equation.
For x = 2,
2(2) + y = 7
⇒ y = 3
Therefore, (2, 3) is a solution of this equation.
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