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x+x+2,8+x+2,8+1,25=20,05
3x+4,05+2,8+20,05
3x+6,85=20,05
3x=20,05-6,85
x=4,4
4,4;7,2;8,45
3x+6,85=20,05
3x=13,2
x=4,4