Knowing Hicksian and Marshallian demand functions which are optimal solutions to consumption utility maximization problems (E6) and to consumer expenditure minimization problems (E8), analyse income and substitutive effects of changes in prices of goods. For this purpose use a Slutsky equation for i-th good, i equals 1 comma 2 i equals 1 comma 2 i equals 1 comma 21i equals 1 comma 2i equals 1 comma 22.