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0,2x+0,3=1,3
0,2x=1,3-0,3
0,2x=1/:2
x=0,5
b)
5x-0,8=0,1+2x
5x-2x=0,1+0,8
3x=0,9/3
x=0,3
c)
8x-0,2=8x-0,1
8x-8x=-0,1+0,2
0=0,3
d)
0,01x+17=0,15x
0,01x-0,15x=-17
-0,14=-17
0,14=17
o,o1x + 17 = -0,16x
0,01x + 0,16x = -17
0,17x = -17/: 0,17
x = -100
e)
-0,07(10x - 1) = 0,3x
-0,7x - 1,07 = o,3x
-0,7x - 0,3x = 1,07
-1x = 1,07/: (-1)
x = -1,07