6*(y-1,4)=3,5y+1,6

To solve the equation \( 6 \cdot (y - 1.4) = 3.5y + 1.6 \), follow these steps:

1. Distribute the left side: \[ 6y - 8.4 = 3.5y + 1.6 \]

2. Get all terms involving \( y \) on one side and constant terms on the other side. Subtract \( 3.5y \) from both sides: \[ 6y - 3.5y - 8.4 = 1.6 \] \[ 2.5y - 8.4 = 1.6 \]

3. Now, add \( 8.4 \) to both sides: \[ 2.5y = 1.6 + 8.4 \] \[ 2.5y = 10 \]

4. Finally, divide both sides by \( 2.5 \): \[ y = \frac{10}{2.5} = 4 \]

So, the solution is: \[ y = 4 \]