9x-2y=19 7x=21 can you me answer this question

We have such system of eq

First lets solve second eq
7x=21   /:7   divide both sides by 7
x=3
Now we can substitute it to first equation
9x-2y=19
9*3-2y=19
27-2y=19    /-27 subtract 27 both sides
-2y=-8     /:(-2)  divide both sides by -2
y=4 - its the answer

Ibelieve it's a. 2.2 - x = -10.85 (plz tell me if it's right : ) )