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What will be the graphical solution type of (x+y=5) and (2x+2y=10)?

Answer and explanation

Correct answer: Infinitely many solutions

The direct answer is option A: infinitely many solutions. Compare the equations: x + y = 5 and 2x + 2y = 10. Multiplying every term of the first equation by 2 gives exactly the second equation. Therefore both equations represent the same line, not two different lines. Every point on that common line satisfies both equations, so there are infinitely many ordered-pair solutions. Option A is correct. Option B, no solution, applies to distinct parallel lines, which these are not. Option C, one solution, applies when two non-parallel lines intersect at one point. Option D, only two solutions, is not the graphical classification for coincident linear equations; a common line has infinitely many points. Memory cue: one equation being a nonzero multiple of the other means coincident lines and infinitely many solutions.

Related tags

Infinite SolutionsCoincident LinesGraphical Method

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