(X-2)/5-(5-2x)/4+(4x-1)/20=4-x
4(х-2)-5(5-2х)+(4х-1)=20(4-х) 4х-8-25+10х+4х-1=80-20х 4х+10х+4х+20х=80+8+25+1 38х=114 х=114:38 х=3