Ответы и объяснения

2013-12-22T14:41:39+00:00
-1.2(x+3) = -1.2x -3.6
-1,7(-х+3) = 1.7x - 5.1
9,3(-2+3х) = -18.6 + 27.9x
1,5(3х+4) = 4.5x +6
2013-12-22T15:01:55+00:00
    =-1.2x-3.6   x= -3.6:(-1.2) х=3        
-1.7(-x+3)=-1.7x-5.1  x=5.1:(-1.7) x=3
9.3(-2+3x)=-18.6+27.9x  x=27.9:9.3    x=3
1.5(3x+4)=4.5x+6  x=6:4.5 x=1.33