She made her first mistake in step 2
-2x+5 =-11
add 5 to each side
-2x-5+5 = -11+5
-2x = -6 (not -16)
divide by -2
-2x/-2 = -6/-2
x = 3
She added 5 to 11 and got 16 and made it negative instead of subtracting 5 from 11 and making it negative
