\(\dfrac{7x-2}{x+5}=3\) ĐK : \(x\ne-5\)
\(\Leftrightarrow\dfrac{7x-2}{x+5}=\dfrac{3\left(x+5\right)}{x+5}\)
`=>7x-2=3(x+5)`
`<=>7x-2=3x+15`
`<=>7x-3x=15+2`
`<=>4x=17`
`<=>x=17/4(TM)`
1) \(\dfrac{7x-3}{x-1}\) = \(\dfrac{2}{3}\)
2) \(\dfrac{2\left(3-7x\right)}{1+x}\) = \(\dfrac{1}{2}\)
3) \(\dfrac{x^{2^{ }}-6}{x}\) = x + \(\dfrac{3}{2}\)
4) \(\dfrac{5}{3x+2}\) = 2x - 1
5) \(\dfrac{\left(x^2+2x\right)-\left(3x+6\right)}{x-3}\) = 0
6) \(\dfrac{1}{x-2}\) + 3 = \(\dfrac{3-x}{x-2}\)
Giải Phương Trình-7x^2+4/x^3+1=5/x^2-x+1-1/x+1
1, giải các pt sau
a, \(\frac{7x-3}{x-1}=\frac{3}{2}\)
b, \(\frac{2\left(3-7x\right)}{1+x}=\frac{1}{2}\)
c, \(\frac{1}{x-2}+3=\frac{3-x}{x-2}\)
d, \(\frac{x+5}{x-5}-\frac{x-5}{x+5}=\) \(\frac{20}{x^2-25}\)
giúp mik v mn ơi
1, 7x - 4 = 3x + 20
2, 2x - 5^2 - x + 2^2 = 0
3, 2/x+1 + 1 = 7/x+1 
a) \(\frac{1}{2x-3}-\frac{3}{x\left(2x-3\right)}=\frac{5}{x}\)
b)\(\frac{x+2}{x-2}-\frac{1}{x}=\frac{2}{x\left(x-2\right)}\)
c)\(\frac{x +1}{x-2}+\frac{x-1}{x +2}=\frac{2\left(x^{2^{ }}+2\right)}{x^2-4}\)
d)(2x+3)\(\left(\frac{3x+8}{2-7x}+1\right)=\left(x-5\right)\left(\frac{3x+8}{2-7x}+1\right)\)
giải phương trình chứa ẩn ở mẫu:
1) x+6/x-5 + x-5/x+6 = 2x^2+23x+61/x^2+x-30
2) 6/x-5 + x+2/x-8 = 18/(x-5)(8-x) - 1
3) x^2-x/x+3 - x^2/x-3 = 7x^2 - 3x/9-x^2
giải phương trình
a)(x+3)^2-(x-3)^2=6x+18
b)x+3 phần x-2=5 phần (x-2)(3-x)
c)12x^2+30x-21 phần 16x^2-9
-3x-7 phần 3-4x =6x+5 phần 4x+3
d)4 phần x+1-2 phần x-2=x+3 phần x^2-x-2
Giải các phương trình sau:
a) \(\dfrac{7x-3}{x-1}=\dfrac{2}{3}\).
b) \(\dfrac{2\left(3-7x\right)}{1+x}=\dfrac{1}{2}\).
c) \(\dfrac{1}{x-2}+3=\dfrac{3-x}{x-2}\).
d) \(\dfrac{8-x}{x-7}-8=\dfrac{1}{x-7}\).
