Ответ:
8.7-х=3.9
х=8.7-3.9
х=4.8
[tex]8.7 - x = 3.9 \\ - x = 3.9 - 8.7 \\ x = 4.8 \\
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Ответ:
8.7-х=3.9
х=8.7-3.9
х=4.8
Ответ:
[tex]8.7 - x = 3.9 \\ - x = 3.9 - 8.7 \\ x = 4.8 \\