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

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

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

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

(0.1x+2)/0.3-(x-1)/0.5=1.2
1.5*(0.1x+2)/0.3-1.5(x-1)/0.5=1.2*1.5
0.5x+10-3x+3=1.8
-2.5x=-11.2
x=4.48
2y/0.3-(1.4-3y)/0.2=-8/3
6*2y/0.3-6*(1.4-3y)/0.2=-8/3*6
40y-30*1.4+30*3y=-16
130y=26
y=0.2