3.27x+1.28y+1.83x-2.77y

5.1x - 1.49y

Step-by-step explanation:

We need to add or substract like terms.

like terms are the terms that have the same variable, in this case:

3.27x and 1.83x are like terms, and adding them we get:

3.27x + 1.83x = 5.1x (you add only the coefficients and the x stays the same)

we do the same for the terms with 'y':

1.28y and - 2.77y are like terms, but in this case we must substract because of the - sign:

1.28y - 2.77y = - 1.49y

the final answer is the conjunction of the two results that we obtained:

5.1x - 1.49y