Ответ:
7.
(3.64/(-1.4)-0.4)/0.15+13.8=(-2.6-0.4)/0.15+13.8=-3/0.15+13.8=-20+13.8=-6.2
8.
0.2(x-3)=0.4(7-x)-4.6
0.2x-0.6=2.8-0.4x-4.6
0.2x+0.4x=2.8-4.6+0.6
0.6x=-1.2
x=-2
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Answers & Comments
Ответ:
7.
(3.64/(-1.4)-0.4)/0.15+13.8=(-2.6-0.4)/0.15+13.8=-3/0.15+13.8=-20+13.8=-6.2
8.
0.2(x-3)=0.4(7-x)-4.6
0.2x-0.6=2.8-0.4x-4.6
0.2x+0.4x=2.8-4.6+0.6
0.6x=-1.2
x=-2