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x+2=-3/-2
x=-5
b)0,25x+0,4=0,35/*100
25x+40=35/-40
25x=-5/:25
x=-1/5
c)1-0,2x=-0,3x/*10
10-2x=-3x
x=-10
d)0,01x-1=0,1x-0,1/*100
x-100=10x-10
x=10
zad6
15+x=70/-15
x=55