Toán Lớp 7: Tìm x biết: (x+14)/86 + (x+15)/85 + (x+16)/84 + (x+17)/83 = -4
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Toán Lớp 7: Tìm x biết: (x+14)/86 + (x+15)/85 + (x+16)/84 + (x+17)/83 = -4
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(x+14)/86 + (x+15)/85 + (x+16)/84 + (x+17)/83 = -4 (x+14)/86 + (x+15)/85 + (x+16)/84 + (x+17)/83 = (-1)+(-1)+(-1)+(-1)(x+14)/86 + (x+15)/85 + (x+16)/84 + (x+17)/83 = (-86)/86+(-85)/85+(-84)/84+(-83)/83(x+14)/86 + (x+15)/85 + (x+16)/84 + (x+17)/83 = (-100+14)/86+(-100+15)/85+(-100+16)/84+(-100+17)/83x=-100