Should be -8x not 8x.
On Line 3, the 8x should be -8x.
he should not change the -8x as it did not 'move' to the other side
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2-8x should be -8x and not 8x.
Line 4. It should be -8x and not 8x
There is a mistake at Line 4. It should be -8x = 43-9x not 8x = 43 - 9x.
from line 3 to 4 the minus sign for -8x disappears
There is a mistake on line 4 . It should be -8 instead of 8 as he did not 'move ' the 8 so it should remain the same
The steps are too quick and rushed until it is hard to see what is going on. The main mistake was when 2-8x, and 2 is carried over but the minus sign next to the 8x was not, but somehow it disappeared.-Alex
On line 4, 8x should be negative 8x.
The problem starts from line 4. It should be -8x = 43 - 9x . Therefore, line 5 should be x = 43 .
The charge of the number can be determined by looking at the operation at the left of the number. As the operation before 8 is a minus, It is minus 8 not 8