我想問下f.1 maths

As follow AS~~~

圖片參考：http://www.photo-host.org/img/499367screenhunter_01_oct._15_19.53.gif

1. h-[2(h-1)+10]=5(h-34)
h-[2(h-1)+10]=5h-170
-2(h-1)-10=5h-h-170
-2h+2-10=4h-170
-162=6h
-162/6=h
h=-27


2. s+1/3+s-1/7=-6
s+1/3+s+6=1/7
(3+s)s+1/3+s+6(3+s)=3+s/7
s+1+6s+18=3+s/7
7s+19=3+s/7
(7)7s+19=(7)3+s/7
49s+133=3+s
50s=-130
s=-130/50
s=-26

Hope I can help you.

h-[2(h-1)+10]=5(h-34)
h-[2(h-1)+10]=5h-170
-2(h-1)-10=5h-h-170
-2h+2-10=4h-170
-162=6h
-162/6=h
-27=h


s+1/3+s-1/7=-6
s+1/3+s+6=1/7
(3+s)s+1/3+s+6(3+s)=3+s/7
s+1+6s+18=3+s/7
7s+19=3+s/7
(7)7s+19=(7)3+s/7
49s+133=3+s
50s=-130
s=-130/50
s=-26