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What is the number of solutions for (3x+2y=7) and (6x+4y=14)?

Answer and explanation

Correct answer: Infinitely many solutions

The direct answer is option C: infinitely many solutions. First compare the two equations. Multiplying every term of 3x+2y=7 by 2 gives 6x+4y=14, which is exactly the second equation. Thus both equations describe the same straight line, not two different lines. Every point satisfying the first equation also satisfies the second, so there are infinitely many common points. Option A, no solution, is wrong because the lines are not parallel distinct lines. Option B, one unique solution, would occur when two different lines intersect at one point. Option C is correct because coincident lines overlap completely. Option D, exactly two solutions, is impossible for two linear equations representing lines: two distinct lines meet once, identical lines meet infinitely often, and parallel lines never meet. Memory cue: if one complete equation is a non-zero multiple of the other, the lines coincide and solutions are infinite.

Related tags

Linear EquationsSolvabilityInfinite Solutions

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