Ответ:
[tex]8x + 15 = 39 - 4x \\ 8x + 4x = 39 - 15 \\ 12x = 24 \\ x = 24 \div 12 \\ x = 2[/tex]
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Ответ:
[tex]8x + 15 = 39 - 4x \\ 8x + 4x = 39 - 15 \\ 12x = 24 \\ x = 24 \div 12 \\ x = 2[/tex]