2x-1-x/3=x+2/4-3 1/5(2x-1/3-4)=1 x-0.1/0.3-1.2=x+0.2/0.5 5x+a/3=a-x/2+2a(2a为已知数)

2x-1-x/3=x+2/4-3
24x-4(1-x)=3(x+2)-36
24x-4+4x=3x+6-36
25x=-26
x=-26/25
1/5(2x-1/3-4)=1
(2x-1)-4=5
2x-1=9
2x=10
x=5
x-0.1/0.3-1.2=x+0.2/0.5
0.5(x-0.1)-1.2*0.3*0.5=0.3(x+0.2)
5(x-0.1)-1.2*1.5=3(x+0.2)
5x-0.5-1.8=3x+0.6
2x=2.9
x=1.45
5x+a/3=a-x/2+2a
2(5x+a)=5(a-x)+12a
10x+2a=5a-5x+12a
15x=15a
x=a