(x-1)/0.3-(x+7)/0.5=1.7 x/0.7-(0.17-0.7x)/0.

(x-1)/0.3-(x+7)/0.5=1.7
(x-1)/3-(x+7)/5=0.17
5(x-1)-3(x+7)=2.55
5x-5-3x-21=2.55
2x=31.55
x=15.775
x/0.7-(0.17-0.7x)/0.03=1
10x/7-100(0.17-0.7x)/3=1
10x/7-17/3+70x/3=1
30x-170+490x=21
520x=191
x=191/520