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5+x/4=2/3-x/6-2/3+10/4-5x/12
x/4+x/6+5x/12=2/3-2/3+10/4-5
(6x+4x)/24+5x/12=0+[(10-20)/4]
10x/24+5x/12=-10/4
5x/12+5x/12=-5/2
10x/12=-5/2
10x=(-5/2)12
10x=-60/2
X=(-60/2)/10
X=-60/20=-30/10=-3/1=-3
X=-3