Solve the following pair of linear equations by the substitution and cross-multiplication methods:
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(i) For which values of a and b does the following pair of linear equations have an infinite number of solutions?
Which of the following pairs of linear equations has unique solution, no solution, or infinitely many solutions. In case there is a unique solution, find it by using cross multiplication method.
Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method:
Solve the following pair of linear equations by the elimination method and the substitution method: