2,7y+3,4y-1,2y=18,62

Let's solve the equation step by step.

The equation given is:

\[ 2.7y + 3.4y - 1.2y = 18.62 \]

First, combine the \(y\) terms on the left-hand side:

1. Combine the coefficients: \[ 2.7 + 3.4 - 1.2 = 5.9 \]

So the equation simplifies to:

\[ 5.9y = 18.62 \]

Next, to solve for \(y\), divide both sides by 5.9:

\[ y = \frac{18.62}{5.9} \]

Calculating the right side gives:

\[ y \approx 3.16 \]

Thus, the solution is:

\[ y \approx 3.16 \]