\(\frac{x+91}{81}+\frac{x+92}{82}+\frac{x+93}{83}=3\)
\(\frac{x+91}{81}-1+\frac{x+92}{82}-1+\frac{x+93}{83}-1=0\)
\(\frac{x+10}{81}+\frac{x+10}{82}+\frac{x+10}{83}=0\)
\(\left(x+10\right)\left(\frac{1}{81}+\frac{1}{82}+\frac{1}{83}\right)=0\)
=> x + 10 = 0 (vì \(\left(\frac{1}{81}+\frac{1}{82}+\frac{1}{83}\right)\ne0\))=> x = -10
Giải các phương trình sau
1)\(\dfrac{x+1}{85}+\dfrac{x+3}{83}=\dfrac{x+5}{81}+\dfrac{x+7}{79}\)
2)\(\dfrac{x-1}{2015}-\dfrac{x+3}{2011}=\dfrac{x+7}{2007}-\dfrac{x+11}{2003}\)
3)\(\dfrac{x+4}{4}-\dfrac{x-3}{6}=\dfrac{x}{3}\)
4)\(x-\dfrac{x+1}{3}=\dfrac{2x+1}{5}\)
5) \(\dfrac{2x-7}{5}+\dfrac{x+11}{2}=-4\)
giúp em vs ạ, em đang cần gấp
em c.ơn trước ạ
từ dễ đến bình thường
giải các phương trình sau
1)3=x-8
2)2x=7+x
3)x-(8-x)=4
1) (x+5)(x+2)-3(4x-3)=(5-x)2
2) (x+2)3-(x-2)3=12x(x-1)-8
3) 3x(12x-4)-9x(4x-3)=30
4) (12x-5)(4x-1)+(3x-7)(1-16x)=81
Giải phương trình:
a) (x + 5)(x + 2) = 3(4x - 3) + (x - 5)2
b) 12 - 2(1 - x)2 = 4(x - 2) - (x - 3)(2x - 5)
c) (x - 3)3 - 2(x - 1) = x(x - 2)2 - 5x2
d) x(x + 3)2 - 3x = (x + 2)3 + 1
1) (3x-2)/3-2=(4x+1)/4
2) (x-3)/4+(2x-1)/3=(2-x)/6
3) 1/2 (x+1)+1/4 (x+3)=3-1/3 (x+2)
4) (x+4)/5-x+4=x/3-(x-2)/2
5) (4-5x)/6=2(-x+1)/2
6) (-(x-3))/2-2=5(x+2)/4
7)2(2x+1)/5-(6+x)/3=(5-4x)/15
8) (7-3x)/2-(5+x)/5=1
9)(x-1)/2+3(x+1)/8=(11-5x)/3
10)(3+5x)/5-3=(9x-3)/4
Giải các phương trình
1, \(\dfrac{1}{x}-\dfrac{2}{x+1}=\dfrac{3}{x^2+x}\)
2, \(\dfrac{x+2}{x-2}-\dfrac{1}{x}=\dfrac{2}{x\left(x-2\right)}\)
3, \(\dfrac{x-2}{x+2}-\dfrac{3}{x-2}=\dfrac{2\left(x-11\right)}{x^2-4}\)
C= 3x^2-x+2/(x-1) (x+3) +x/x-1 -x-1/x+3
a) \(\left(x^2-16\right)\left(\dfrac{x}{4}-\dfrac{4x+5}{3}\right)=0\)
b) \(\left(4x-1\right)\left(x+5\right)=x^2-25\)
c) \(x\left(x+3\right)^3-\dfrac{x}{4}\left(x+3\right)=0\)
