Question

УПРАСТИТЕ ВЫРАЖЕНИЯ 1 2
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Answer 1

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