If R is the set of all integers, choose the set S that will make the following statement false. S ⊆ R

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Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

How is working backward similar to solving an equation?