x+3+(6x-8)= (5x-2)-8x-5= 30+5(0,2y-6)=

Let's solve each equation step by step:

1. For the equation \( x + 3 + (6x - 8) = \): \[ x + 3 + 6x - 8 = 7x - 5 \]

2. For the equation \( (5x - 2) - 8x - 5 = \): \[ 5x - 2 - 8x - 5 = -3x - 7 \]

3. For the equation \( 30 + 5(0.2y - 6) = \): \[ 30 + 5 \cdot 0.2y - 5 \cdot 6 = 30 + y - 30 = y \]

Summary of the simplified results:

1. \( x + 3 + (6x - 8) = 7x - 5 \)
2. \( (5x - 2) - 8x - 5 = -3x - 7 \)
3. \( 30 + 5(0.2y - 6) = y \)