Answers

2016-07-28T05:55:09+08:00
2/x +1=7/12; 2 + x=7x/12; 24+12x=7x; -5x=12 x=-12/5..ans or is this what you mean, 1/x +1/(x+1)=7/12; mulgtiply each term by x^2+x: x+1 +x =(7x^2+7x)/12; 12x+12+12x=7x^2+7x, 7x^2-17x-12=0; find x by quadratic formula.
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