a) Ta có:
1/x+1/2x=3/2
2/2x+1/2x=3/2
3/2x=3/2
=>2x=2
=>x=1
Vậy x=1
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Ai giúp vs !!!
\(a.\frac{3x-7}{5}=\frac{2x-1}{3}\\ b.\frac{4x-7}{12}-x=\frac{3x}{8}\\ c.\frac{x-2009}{1234}+\frac{x-2009}{5678}-\frac{x-2009}{197}=0\\ d.\frac{5x-8}{3}=\frac{1-3x}{2}\\ e.\frac{x-5}{6}-\frac{x-9}{4}=\frac{5x-3}{8}+2\\ f.\frac{x-1}{\frac{2}{5}}-3-\frac{3x-2}{\frac{5}{4}}-2=1\)
$\frac{4x+3}{5}$ -$\frac{6x-2}{7}$ =$\frac{5x+4}{3}$ +3
b.
$\frac{x+4}{5}$ -x+4=$\frac{x}{3}$ -$\frac{x-2}{2}$
c.$\frac{5x+2}{6}$ -$\frac{8x-1}{3}$ =$\frac{4x+2}{5}$ -5
d.$\frac{2x+3}{3}$ =$\frac{5-4}{2}$
e. $\frac{5x+3}{12}$ =$\frac{1+2x}{9}$
f.$\frac{7x-1}{6}$ =$\frac{16-x}{5}$
g. $\frac{x-3}{5}$ =6-$\frac{1-2x}{3}$
h. $\frac{3x-2}{6}$ -5=$\frac{3-2(x+7)}{4}$
giúp vs ạ, cần gấp
1) Giải các phương trình:
a) \(\frac{x+4}{4}-\frac{x-3}{6}=\frac{x}{3}\)
b) \(x-\frac{x+1}{3}=\frac{2x+1}{5}\)
c)\(\frac{2x-7}{5}+\frac{x+11}{2}=-4\)
d)\(\frac{4x+1}{3}-\frac{2}{3}-\frac{x-3}{6}=x\)
e)\(\frac{5x-2}{4}-\frac{x-8}{3}=\frac{x-1}{2}+5\)
giúp mik vs mai mik kiểm tra rùi
a) $\frac{x-1}{x}$ - $\frac{1}{x+1}$ = $\frac{2x-1}{x2+x}$
b) (x+2).(5-3x)=0
c)$\frac{5(1-2x)}{3}$ + $\frac{x}{2}$ = $\frac{3(x-5)}{4}$ - 2
d)$(x+2)^{2}$ - (x-1).(x+3) = (2x-4).(x+4)-3
e)$(2x-3)^{2}$ = (2x-3).(x+1)
Giải phương trình:1) frac{7x-1}{6}+2xfrac{16-x}{5}2) frac{10x+3}{12}1+frac{6+8x}{9}3)frac{8x-3}{4}-frac{3x-2}{2}frac{2x-1}{2}+frac{x+3}{4}4)frac{3left(3-xright)}{8}+frac{2left(5-xright)}{3}frac{1-x}{2}-25)frac{2left(x-3right)}{7}+frac{x-5}{3}-frac{13x+4}{21}06)frac{6x+5}{2}-left(2x+frac{2x+1}{2}right)frac{10x+3}{4}7)frac{2x-1}{5}-frac{x-2}{3}-frac{x+7}{15}08)frac{x+4}{5}-x+4frac{x}{3}-frac{x-2}{2}giải giúp mik với ạ
Đọc tiếp
Giải phương trình:
1) \(\frac{7x-1}{6}+2x=\frac{16-x}{5}\)
2) \(\frac{10x+3}{12}=1+\frac{6+8x}{9}\)
3)\(\frac{8x-3}{4}-\frac{3x-2}{2}=\frac{2x-1}{2}+\frac{x+3}{4}\)
4)\(\frac{3\left(3-x\right)}{8}+\frac{2\left(5-x\right)}{3}=\frac{1-x}{2}-2\)
5)\(\frac{2\left(x-3\right)}{7}+\frac{x-5}{3}-\frac{13x+4}{21}=0\)
6)\(\frac{6x+5}{2}-\left(2x+\frac{2x+1}{2}\right)=\frac{10x+3}{4}\)
7)\(\frac{2x-1}{5}-\frac{x-2}{3}-\frac{x+7}{15}=0\)
8)\(\frac{x+4}{5}-x+4=\frac{x}{3}-\frac{x-2}{2}\)
giải giúp mik với ạ
1) Giải các phương trình.a) x(x-1)x(x+2)b) -3x+22x+8c) frac{3x-3}{4}2-frac{x-2}{8}d) left(x-frac{1}{2}right)left(x+frac{4}{3}right)0e) frac{2}{5}x+x-frac{1}{3}-frac{4}{7}x+frac{5}{6}f) frac{3x-5}{9}1+frac{2x+4}{6}g) frac{2x-1}{5}-frac{x-2}{3}frac{x+7}{15}h) frac{2x+1}{x-2}3k) frac{2}{x-3}+frac{x-5}{x-1}1
Đọc tiếp
1) Giải các phương trình.
a) x(x-1)=x(x+2)
b) -3x+2=2x+8
c) \(\frac{3x-3}{4}=2-\frac{x-2}{8}\)
d) \(\left(x-\frac{1}{2}\right)\left(x+\frac{4}{3}\right)=0\)
e) \(\frac{2}{5}x+x-\frac{1}{3}=-\frac{4}{7}x+\frac{5}{6}\)
f) \(\frac{3x-5}{9}=1+\frac{2x+4}{6}\)
g) \(\frac{2x-1}{5}-\frac{x-2}{3}=\frac{x+7}{15}\)
h) \(\frac{2x+1}{x-2}=3\)
k) \(\frac{2}{x-3}+\frac{x-5}{x-1}=1\)
Giải Phương trình
a, \(\frac{x+4}{2x^2-5x+2}+\frac{x+1}{2x^2-7x+3}=\frac{2x+5}{2x^2-7x+3}\)
b, \(\frac{x^2}{x^2+2x+2}+\frac{x^2}{x^2-2x+2}-\frac{4.\left(x^2-5\right)}{x^4+4}=\frac{322}{65}\)
c, \(\frac{1}{x-1}+\frac{2x^2-5}{x^3-1}=\frac{4}{x^2+x+1}\)
Trình bày cách làm nữa nha
bài tập. Giải các pt1, frac{5}{x-2}+frac{6}{3-4x}02,frac{x+1}{x-2}frac{1}{x^2-4}3,frac{x+2}{x}-frac{x^2+5x+4}{xleft(x+2right)}frac{x}{x+2}4,frac{1-6x}{x-2}+frac{9x+4}{x+2}frac{xleft(3x-2right)+1}{x^2-4}5,frac{3x+2}{3x-2}-frac{6}{2+3x}frac{9x^2}{9x^2-4}6,frac{x+1}{x}+frac{1}{x+1}frac{2x-1}{2x^2+2}7,frac{2}{x+1}-frac{3x+1}{left(x+1right)}frac{1}{left(x+1right)left(x-2right)}8,frac{4}{x^2+2x-3}frac{2x-5}{x+3}-frac{2x}{x-1}9,frac{3}{x^2+x-2}-frac{1}{x-1}frac{-7}{x+2}
Đọc tiếp
bài tập. Giải các pt
1, \(\frac{5}{x-2}+\frac{6}{3-4x}=0\)
2,\(\frac{x+1}{x-2}=\frac{1}{x^2-4}\)
3,\(\frac{x+2}{x}-\frac{x^2+5x+4}{x\left(x+2\right)}=\frac{x}{x+2}\)
4,\(\frac{1-6x}{x-2}+\frac{9x+4}{x+2}=\frac{x\left(3x-2\right)+1}{x^2-4}\)
5,\(\frac{3x+2}{3x-2}-\frac{6}{2+3x}=\frac{9x^2}{9x^2-4}\)
6,\(\frac{x+1}{x}+\frac{1}{x+1}=\frac{2x-1}{2x^2+2}\)
7,\(\frac{2}{x+1}-\frac{3x+1}{\left(x+1\right)}=\frac{1}{\left(x+1\right)\left(x-2\right)}\)
8,\(\frac{4}{x^2+2x-3}=\frac{2x-5}{x+3}-\frac{2x}{x-1}\)
9,\(\frac{3}{x^2+x-2}-\frac{1}{x-1}=\frac{-7}{x+2}\)
Giải các phương trình sau :a. 3x - 2 (5 + 2x) 45 - 2xb. frac{x-3}{5}6-frac{1-2x}{3}c.frac{5left(x-1right)+2}{6}-frac{7x-1}{4}frac{2left(2x+1right)}{7}-5d. (x - 1) (5x + 3) (3x - 8) (x - 1)e. (x - 1) (x2 + 5x - 2) - (x3 - 1) 0f.frac{x-17}{33}+frac{x-21}{29}+frac{x}{25}4g. frac{x+1}{65}+frac{x+3}{63}frac{x+1}{61}+frac{x+7}{59}h.frac{x+5}{2015}+frac{x+4}{2014}+frac{x+4}{1002}+frac{x+6}{1003}6k.frac{148-x}{25}+frac{169-x}{23}+frac{186-x}{21}+frac{199-x}{19}10
Đọc tiếp
Giải các phương trình sau :
a. 3x - 2 (5 + 2x) = 45 - 2x
b. \(\frac{x-3}{5}=6-\frac{1-2x}{3}\)
c.\(\frac{5\left(x-1\right)+2}{6}-\frac{7x-1}{4}=\frac{2\left(2x+1\right)}{7}-5\)
d. (x - 1) (5x + 3) = (3x - 8) (x - 1)
e. (x - 1) (x2 + 5x - 2) - (x3 - 1) = 0
f.\(\frac{x-17}{33}+\frac{x-21}{29}+\frac{x}{25}=4\)
g. \(\frac{x+1}{65}+\frac{x+3}{63}=\frac{x+1}{61}+\frac{x+7}{59}\)
h.\(\frac{x+5}{2015}+\frac{x+4}{2014}+\frac{x+4}{1002}+\frac{x+6}{1003}=6\)
k.\(\frac{148-x}{25}+\frac{169-x}{23}+\frac{186-x}{21}+\frac{199-x}{19}=10\)