Решите уравнение: 26,9-0,8(3x+40)=x.

\[26,9 - 0,8(3x + 40) = x\]

\[26,9 - 2,4x - 32 = x\]

\[- 3,4x = 5,1\]

\[x = - \frac{5,1}{3,4} = - \frac{51}{34}\]

\[x = - \frac{3}{2} = - 1,5.\]