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![0.4(2x+\frac{1}{2})=3[0.2x+(-2)]-4\ \ \ | omit\ brackets\\\\ 0.8x+0.2=0.6x-6-4\\\\ 0.8x+0.2=0.6x-10\ \ \ | subtract\ 0.6x\\\\ 0.2x+0.2=-10\ \ \ | subtract\ 0.2\\\\ 0.2x=-10.2\ \ \ | divide\ by\ 0.2\\\\ x=-51](/tpl/images/0753/4464/53c8f.png)
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0.4(2x+1\2)=3[0.2x+(-2)]-4...
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