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Choose the correct conclusion for (3x-4y=8) and (6x-8y=16).

Answer and explanation

Correct answer: Infinitely many solutions

The direct answer is option C: infinitely many solutions. The first equation is 3x-4y=8. Multiplying every term by 2 gives 6x-8y=16, which is exactly the second equation. Thus the two equations do not describe two different lines; they describe the same line. Every point on that line satisfies both equations, so there are infinitely many solutions. Option A, one solution, would require two different lines that intersect once. Option B, no solution, would require distinct parallel lines, usually with equal coefficient ratios but a different constant ratio. Option C is correct because the second equation is simply twice the first. Option D, inconsistent, is wrong because this system is consistent: it has solutions, in fact infinitely many. For example, from 3x-4y=8, choosing suitable values such as x=4,y=1 works, and many other points work too. Memory cue: multiplying an entire equation by a nonzero number does not change its line.

Related tags

Linear EquationsDependent PairInfinite Solutions

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