Question

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Answer 1

$a) ; 5cdot a - 3, ; ; a = 2; \\ 5cdot a - 3 = 5cdot 2 - 3 = 10 - 3 = 7 \\\ b) ; dfrac{1}{5}cdot b + b, ; ; b = dfrac{5}{2}; \\\ dfrac{1}{5}cdot b + b = dfrac{1}{5}cdot dfrac{5}{2} + dfrac{5}{2} = dfrac{1}{2} + dfrac{5}{2} = dfrac{6}{2} = 3$