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0,1x=-3-0,2
0,1x=-3,2
x=-32
b)0,25x+0,4=0,35
0,25x=0,35 - 0,4
0,25x=-0,05
x=0,2
c)1-0,2x= -0,3x
1= -0,3x+0,2x
1= -0,1x
x = -10
d)0,01x - 1 = o,1x - 0,1
0,01x - 0,1x = - 0,1+1
-0,9x=0,9
x=-9