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0,1x+0,2=-0,3
0,1x=-0,5
x=-0,5/0,1
x=-5
b)
0,25x+0,4=0,35
0,25x=-0,05
x=-0,05/0,25
x=-0,2
c)
1-0,2x=-0,3x
1=-0,1x
x=1/0,1
x=10
d)
0.01x-1=0,1x-0,1
0,01x-0,1x=-0,1+1
-0,09x=0,9
x=0,9/-0,09
x=-10