In the elimination method --------- is a must.

Equating both the co-efficients

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Equating only the x co-efficient

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Equating either of the co-efficients

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Equating only the y co-efficient

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Solution

The correct option is C
Equating either of the co-efficients

Equating either of the co-efficients is a must to get rid of one variable by either adding two equation or subtracting the equation.

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