(2/2)x+2)/0.5=1.2,(2x-2)/6-(5x+1)/8=1,(y-2)/5-(y+3)/10-3这五道题怎么做

题目

(2/2)x+2)/0.5=1.2,(2x-2)/6-(5x+1)/8=1,(y-2)/5-(y+3)/10-3这五道题怎么做

答案

(x-1)/0.3-(x+2)/0.5=1.2
5x-5-3x-6=1.8
2x=12.8
x=6.4
(2x-2)/6-(5x+1)/8=1
8x-8-15x-3=24
7x=-35
x=-5
(y-2)/5-(y+3)/10=3
2y-4-y-3=30
y=30+7
y=37