Assume that the fasting blood level of a lipid is normally distributed in the population of people who do not have disease "x." there is a smaller distribution curve of the fasting blood levels of this lipid, which also is normal in shape, for the population of persons who have disease "x," and the curve overlaps the upper end (right side) of the curve for people without the disease. draw distribution curves for the diseased and non-diseased populations and discuss the effects upon sensitivity and specificity of setting the cut point for disease and non-disease at various positions on the two overlapping curves.

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)