332
а) -3м+1,9 = 2м+8,5 -3м-2м = 8,5-1,9 -5м = 8,5 -1,9 -5м = 6,6 м= -1,32
б)(5х-1) *1,6 =1,8х -4,7 8х -1,6 = 1,8х -4,7 8х -1,8х = 1,6 -4,7 6,2х = -3,1 х =-0,5
338
а) (-20,47 / (-8,9)) + 24,6 *(-0,5)) / 0,1 = ( 2,3 -12,3) / 0,1 = - 100
б) (6 1/2 - 8 3/4) / 1/8 + 11 3/7 = (13/2 - 35/4) /1/8 + 11 3/7 =(26/4 -35/4) / 1/8 + 11 3/7 =
9/4 / 1/8 +11 3/7 = 18 +11 3/7 = 29 3/7
в) ((5 - 3,76) /1 7/8 ) / ((1 5/6 - 1 3/4) *2,4 ) = ((124/100) / 15/8 ) / ((11/6 -7/4)*12/5) = (496/75) / ((22/12 -21/12) *12/5) = (496/75) / (1/12) * 12/5 = (496/75) / (1/5) = 496/15 =
33 1/15