Ответ:
0,2z – 0,8 = –0,6z – 0,4
0.2z+0.6z=-0.4+0.8
0.8z=0.4
z=0.5
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Ответ:
0,2z – 0,8 = –0,6z – 0,4
0.2z+0.6z=-0.4+0.8
0.8z=0.4
z=0.5