Question 1030642
Let x be the cafeteria floor. The elevators final resting spot is on the first floor, which we represent as floor 1.

X+2-4+7-3+5-10=1
X = 1-2+4-7+3-5+10
X=4

Checking our work, let's follow the elevator's trip:
4th floor to 6th, down to 2nd,up to 9th,down to 6th, up to 11th, back down to the first floor, where all this started.!!!!!!!