[tex]0.8(x - 2) - 0.7(x - 1) = 2.7 \\ 0.8x - 1.6 - 0.7x + 0.7 = 2.7 \\ 0.1x = 2.7 + 1.6 - 0.7 \\ 0.1x = 3.6 \\ x = 36[/tex]
Ответ: 36.
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[tex]0.8(x - 2) - 0.7(x - 1) = 2.7 \\ 0.8x - 1.6 - 0.7x + 0.7 = 2.7 \\ 0.1x = 2.7 + 1.6 - 0.7 \\ 0.1x = 3.6 \\ x = 36[/tex]
Ответ: 36.