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If (16x-8y=64) and (2x-y=t) are inconsistent, what is the correct condition for (t)?

Answer and explanation

Correct answer: \(t\ne 8\)

Dividing the first equation by 8 gives \(2x-y=8\). Thus, the left-hand sides of the two equations are identical. If \(t=8\), both equations represent the same line and have infinitely many solutions. For the equations to be inconsistent, their right-hand sides must differ; hence, \(t\ne 8\). Exam tip: identical left-hand sides with different right-hand sides imply no solution.

Related tags

Linear EquationsConditions For SolvabilityInconsistent EquationsParameterPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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