Question

памагите решить вопрос​

Answer 1

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