Ответ

Автор - millka000054

-6 ( 3х + 1 ) - ( х - 8 ) = 15

-18х - 6 - х + 8 = 15

-18х - х = 15 + 6 - 8

-19х = 13

х = -13/19.

Ответ : х = -13/19.

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Удачи))))

Ответ

Автор - mkomron

 - 6(3x + 1) - (x - 8) = 15

 - 18x - 6 - x + 8 = 15

 - 19x + 2 = 15

 - 19x = 15 - 2

 - 19x = 13

 frac{ - 19x}{ - 19}  =  frac{13}{ - 19}

x =  -  frac{13}{19}

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