Tìm x biết:
\(\frac{x-25-124}{2015}+\frac{x-124-2015}{25}+\frac{x-2015-25}{124}=3\)
Tìm x biết:
\(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}=3\)
tìm x biết a)\(\frac{x-100}{24}+\frac{x-98}{26}+\frac{x-96}{28}=3\)
b)\(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}=3\)
a )
\(\Rightarrow\frac{x-100}{24}-1+\frac{x-98}{26}-1+\frac{x-96}{26}-1=0\)
\(\frac{x-124}{24}+\frac{x-124}{26}+\frac{x-124}{28}=0\)
\(\left(x-124\right)\left(\frac{1}{26}+\frac{1}{24}+\frac{1}{28}\right)=0\)
\(\Rightarrow x-124=0\Rightarrow x=124\)
b)
\(\frac{x-28-124}{2011}-1+\frac{x-124-2011}{28}-1+\frac{x-2011-28}{124}-1=0\)
\(\Rightarrow\frac{x-2163}{2011}+\frac{x-2163}{28}+\frac{x-2163}{124}=0\)
\(\left(x-2163\right)\left(\frac{1}{2011}+\frac{1}{28}+\frac{1}{124}\right)=0\)
=) x - 2163 =0
x= 2163
tìm x"
\(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}=3\)
giúp mình nha m.n
Tìm số hữu tỉ x, biết:
a, \(\frac{x-100}{24}+\frac{x-98}{26}+\frac{x-96}{28}=3\)3
b, \(\frac{x-1}{65}+\frac{x-3}{63}=\frac{x-5}{61}+\frac{x-7}{59}\)
c, \(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}=3\)
giúp với gấp lắm
a) Tính :
\(3\frac{1}{2}+\frac{2014}{2015}-0,5+\frac{1}{2015}\)
b) Tìm x :
\(85\%\times x+25\%\times x=110\)
a) Ta có: \(3\frac{1}{2}+\frac{2014}{2015}-0,5+\frac{1}{2015}\)
\(=\frac{7}{2}-\frac{1}{2}+1\)
\(=3+1=4\)
b) Ta có: \(85\%\cdot x+25\%\cdot x=110\)
\(\Leftrightarrow x\left(85\%+25\%\right)=110\)
\(\Leftrightarrow x\cdot110\%=110\)
\(\Leftrightarrow x\cdot\frac{11}{10}=110\)
hay \(x=110:\frac{11}{10}=110\cdot\frac{10}{11}=100\)
Vậy: x=100
\(\frac{X-28-124}{2011}+\frac{X-124-2011}{28}+\frac{X-2011-28}{124}=3\)
ta co (x-2163)(1/2011+1/28+1/124)=0
vi 1/2011+1/28+1/124khac0
x-2163=0
x=2163
Tìm X biết: 124 : X + 24 : X – 48 : X = 25.
124 : x + 24 : x - 48: x = 25
( 124 + 24 - 48 ) : x = 25
100 : x = 25
x = 4
\(124\div x+24\div x-48\div x=25\)
\(\Leftrightarrow\left(124+24-48\right)\div x=25\)
\(\Leftrightarrow100\div x=25\)
\(\Leftrightarrow x=100\div25=4\)
124/x + 24/x - 48/x =25
=>(124 + 24 - 48)/x=25
=>100/x=25
=>x=4
\(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}\)=3
Áp dụng tính chất của dãy tỉ số bằng nhau
Áp dụng tính chất của dãy tỉ số bằng nhau nha ^^^
Tìm các số tự nhiên x, y biết :
a) 2x = 4y - 1 và 27y = 3x + 8
b) \(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}\)