Ответ:
1) - 0,8х=0,72
0,8х=-0,72
х=-0,9
2) 1/9:х=-8/27
1/9:х=-8/27
1/9*1/х=-8/27
1/9х=-8/27
27=-72х
х=-3/8
3) -34/7х=-25/28
34/7х=25/28
175х=952
х=136/25
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Ответ:
1) - 0,8х=0,72
0,8х=-0,72
х=-0,9
2) 1/9:х=-8/27
1/9:х=-8/27
1/9*1/х=-8/27
1/9х=-8/27
27=-72х
х=-3/8
3) -34/7х=-25/28
34/7х=25/28
175х=952
х=136/25