1) 0,5(a-3b)-(3b+0.5a)= 0.5a - 1.5b - 3b-0.5a = -1.5b - 3b = -4.5b 2) (1/3x+y)-2/3(x+1.5y) = 1/3x +y - 2/3x - y = 1/3x-2/3x = - 1/3x
1) 0,5(а-3в)-(3в+0,5а)=0,5а-1,5в-0,5а-3в=-4,5в 2) (1/3x+y)-2/3(x+1.5y)= 1/3x+y-2/3х-у=-1/3х