8*(0,7x-4)-2*(0,2x-3)=-395,6x - 32 - 0,4x + 6 = - 395,2x = -39+32-65,2x = - 13
x = - 2,5Ответ6 - 2,5
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8*(0,7x-4)-2*(0,2x-3)=-39
5,6x - 32 - 0,4x + 6 = - 39
5,2x = -39+32-6
5,2x = - 13
x = - 2,5
Ответ6 - 2,5