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Which equation is satisfied by the point (3, 7)?

Answer and explanation

Correct answer: x + y = 10

The governing concept is point verification by substitution. An ordered pair (x, y) satisfies an equation when replacing x and y by its coordinates makes the statement true. For (3, 7), option A gives x + y = 3 + 7 = 10, exactly matching its right-hand side. Option B fails because the same sum is 10, not 12. In option C, x − y = 3 − 7 = −4, not 10. In option D, 2x + y = 2(3) + 7 = 6 + 7 = 13, not 16. Thus the point lies on the line represented by option A and on none of the other listed lines. The direct substitution check is sufficient and gives one unambiguous answer, so A is correct.

Related tags

Ordered-PairsSubstitutionLinear-EquationsPoint-VerificationGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematics

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