/x-1/ +3./x-5/ =6
giúp mình với,thanks
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\(x\times\dfrac{3}{5}=\dfrac{2}{3}+\dfrac{1}{6}=\dfrac{5}{6}\)
\(x=\dfrac{5}{6}:\dfrac{3}{5}=\dfrac{25}{18}\)
a) 6/-x=x/-24
=> -x.x=6.-24
=>-x.x=-144
=>x=12 hay x=-12
b)9/x=-35/105
=>9/x=-1/3
=>x=9.3/-1=-27
=>x=-27
c)x-1/8=5/8
=>x=5/8+1/8
=>x=3/4
d)x-1/2-(3/2+x)=-2
=>-x+4/2=-2
=>-x/2=0
=>x=0
e)x+1/3=-12/5.10/6
x+1/3=-4
x=-4-1/3
x= -13/3
#YM
\(a,\dfrac{3}{4}:\dfrac{6}{x}=\dfrac{5}{4}\\ \dfrac{6}{x}=\dfrac{3}{4}:\dfrac{5}{4}\\ \dfrac{6}{x}=\dfrac{3}{5}\\ x=6:\dfrac{3}{5}\\ x=10\\ b,\left(x+\dfrac{7}{4}\right)\times\dfrac{2}{3}=6\\ x+\dfrac{7}{4}=6:\dfrac{2}{3}\\x+\dfrac{7}{4}=9\\ x=9-\dfrac{7}{4}\\ x=\dfrac{29}{4}\)
a, \(\dfrac{4x}{7}=\dfrac{1}{5}+\dfrac{2}{3}=\dfrac{3+10}{15}=\dfrac{13}{15}\Rightarrow60x=91\Leftrightarrow x=\dfrac{91}{60}\)
b, \(\dfrac{5}{7}:x=\dfrac{1}{6}+\dfrac{4}{5}=\dfrac{5+24}{30}=\dfrac{29}{30}\Leftrightarrow x=\dfrac{5}{7}:\dfrac{29}{30}=\dfrac{150}{203}\)
15/8−4/9×6/8+1/6=15/8−24/72+1/6=15/8−1/3+1/6
=45/24−8/24+4/24=(45−8+4)/24=41/24
a) 11 - 3(2x - 1) = -8x + 5
⇔ 11 - 6x + 3 = -8x + 5
⇔ -6x + 8x = 5 - 11 - 3
⇔ 2x = -9
⇔ x = -9/2
Vậy S = {-9/2}
b) (x - 3)/5 + (1 + 2x)/3 = 6
⇔ 3(x - 3) + 5(1 + 2x) = 6.15
⇔ 3x - 9 + 5 + 10x = 90
⇔ 13x = 90 + 9 - 5
⇔ 13x = 94
⇔ x = 94/13
Vậy S = {94/13}
`7/9 xx 3/14 : 5/6`
`= 1/6 : 5/6`
`= 1/6 xx 6/5`
`= 1/5`.
\(ƯC\left(18,54\right)=Ư\left(18\right)=\left\{1;2;3;6;9;18\right\}\\ \Rightarrow x\in\left\{9;18\right\}\)
Xét 2 t/h :
TH1:
x - 1 + 3x - 15 = 6
4x = 22
x = 5,5
TH2:
1 - x + 15 - 3x = 6
4x = 10
x = 2,5
Vây,........