Question 1053884
The x's disappear in your last part.
130(0.85)+x(0.0)=(130+x)(0.10).  The percentage of alcohol for the x on the left is 0.
110.5=13+0.10x
97.5=0.10x
x=975 ml
That seems like a lot, but one is starting with 85% and has to dilute it about 1 in 7-8 parts, so it is not surprising more water is needed.