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When we have two fractions on either sides of an equality or inequality symbol, we can multiply the numerator on the right hand side (RHS) with the denominator of the left hand side (LHS) and the numerator of LHS with denominator of RHS. The process of multiplying across the symbol and down is referred to as cross-multiplication. Of course, when we have only one fraction on one side, we multiply only one side. The basic idea is to eliminate fractions.
a/b = c/d implies a*d = b*cx/y = z implies x = y*z
With examples, discuss how cross-multiplication works in the context of inequalities
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