a;|x|=12b;|x+1|=4c;|2x-1|=7d;|x-1|+(-5)=2e;-10-|5-x|=-12f;32-8|2x-9|=24g;4|x-5|-54=-34h;259-51|4x+3|=(-10)mũ2*3+10mũ1
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