October 2018 2 15 Report

a) 3 (0,6a - 1,1b +0,9c) - 4 (o,3a + 1,2b - 0,3c)
b) 4( 2½a - 1¼a - 1¾b)
c)2 ½ (a- 2b) - ¼(3a+2b)+ 1¼ (2a-3b)
d)0,4 (3a+2b) - 0,3 (-6a +b) -0,7 (2a - 3b)
e) -1,3 (-2a + 3b) -2,1 (a-2b) - 0,5 (5a - 2b)


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