(37.9 + 12.4) + 8.16 i think, i could be wrong though.
Ajajajsjsjjsjsjdjdjdjdjd sorry but I need more points
By=x+2, as this is the only equation that shows the relation between 2 variables
First you had to remove parenthesis first.

Multiply by the numbers.

Final answer 



Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie