137. Реши уравнения: 1) 2,5x − x + 3,8x + 0,7x = 0,54; 2) 3 1/4 + 1/2 y + 1 1/3 + 5/6 y = 5 11/12.

1. \(2.5x-x+3.8x+0.7x=0.54\).
   \(6x=0.54\).
   \(x=0.09\).
2. \(3\frac14+1\frac13+\left(\frac12+\frac56\right)y=5\frac{11}{12}\).
   \(\frac{55}{12}+\frac43y=\frac{71}{12}\).
   \(\frac43y=\frac43\).
   \(y=1\).

Ответ: 1) \(x=0.09\); 2) \(y=1\).