Answer:
In step 1 when he multiplied the values he was supposed to get +18 not -18
Explanation:
a negative times a negative equals a positive
-3(2x-6) = 2(x+5)
-6x+18. ← (that's where he went wrong) = 2x+ 10
-6x-2x+18= 2x -2x +10
-8x + 18= 10
-8x+18-18= 10-18
-8x=-8
x= 1