The first one is the 13 in bracket
It’s meant to be 2x multiplied by 4 = 8x
And 2x multiplied by -17 = -34x
The total on the right is not 26x instead, it will be -26x
The next mistake is on the right. So, the right thing is -26x - 8x = -34x
So x = -17 divided by -34
And the answer is 0.5 or 1/2