CTET 2 Math and Science 2011 Paper

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Question : 55 of 120

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Given linear equations I, II and III, a learner is not able to solve III algebraically. The most likely area of difficulty is that the learner has not understood

that two equations can be added or subtracted to solvethem
that two equations can be solved by method ofsubstitution
the method of solving equations using graphs
that both the equations in III can be altered bymultiplying with suitable numbers

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