Hey there!
When your x = 3 an your y = 11
You multiply by 3
55 × 3 = 165
Then you add by 11
165 + 11 = 176
The equarion: x + y = lets say 14
↪ x + y = 14
Since we found the values of x and y plug them into your equation
x + y = 14
⬇ ⬇ ⬇
3 + 11 = 14
3 + 11 would equal x + y
Good luck on your assignment and enjoy your day!
~LoveYourselfFirst First:)