Question

解方程 （0.1x+2)/0.3-(x-1)/0.5=1.2 2y/0.3-(1.4-3y)/0.2=-8/3

Answer 1

（0.1x+2)/0.3-(x-1)/0.5=1.2

(x+20)/3-2(x-1)=6/5

5(x+20)-30(x-1)=18

5x+100-30x+30=18

-25x=-112

x=112/25

2y/0.3-(1.4-3y)/0.2=-8/3

20y/3-(7-15y)=-8/3

20y-21+45y=-8

65y=13

y=1/5