Question

Упростите выражение. 2)4 2/5(3/11-а)-1 1/5; 4)-2 3/8(4с+8/19)+9 1/2с

Answer 1

$4 frac{2}{5}( frac{3}{11}-a)-1 frac{1}{5}= frac{22}{5}( frac{3}{11}-a)-1 frac{1}{5}= frac{22*3}{5*11}- frac{22}{5}a- frac{6}{5}= frac{6}{5}- frac{22}{5}a- frac{6}{5}=$$- frac{22}{5}a=-4 frac{2}{5}a$

$-2 frac{3}{8}(4c+ frac{8}{19})+9 frac{1}{2}c=- frac{19}{8}(4c+ frac{8}{19})+frac{19}{2}c= - frac{19}{2}c-1+ frac{19}{2}c=-1$