TÌM x:
\(\left(x-5\right)\times\frac{30}{100}=\frac{200x}{100}+5\)
Tìm x:
a) \(x-\left(\frac{50x}{160}+\frac{25x}{200}\right)=11\frac{1}{4}\)
b)\(\left(x-5\right)\cdot\frac{30}{100}=\frac{200x}{100}+5\)
Giúp mình nhanh với, cảm ơn các bạn rất nhiều!
\(A=\frac{-5x}{21}+\frac{-5y}{21}+\frac{-5z}{21}\)
biết x + y = -z
2. Tìm x biết:
\(\left(x-5\right)\cdot\frac{30}{100}=\frac{200x}{100}+5\)\(60\%x+0,4x+\frac{x}{3}=2\)\(1\frac{2}{5}+\left(\frac{\frac{2}{7}+\frac{2}{17}+\frac{2}{37}}{\frac{5}{7}+\frac{5}{17}+\frac{5}{37}}\right)\cdot x=\frac{16}{5}\)
1.
A=\(\frac{-5x+-5y+-5z}{21}=\frac{-5\left(x+y+z\right)}{21}=\frac{-5}{21}.x+y+z\)
A= -z+z=0
<p style="padding: 10000000000000000px;" class="alert success"></p>
ai tích mình mình tích lại cho
Tìm x, biết:
a, \(x-\left(\frac{50x}{100}+\frac{25x}{200}\right)=11\frac{1}{4}\) b,\(\left(x-5\right).\frac{30}{100}=\frac{200x}{100}+5\)
c,\(\frac{x+1}{2}=\frac{8}{x+1}\) d, \(x:\left(9\frac{1}{2}-\frac{3}{2}\right)=\frac{0,4+\frac{2}{9}-\frac{2}{11}}{1,6+\frac{8}{9}-\frac{8}{11}}\)
\(c,\frac{x+1}{2}=\frac{8}{x+1}\)
\(\Rightarrow(x+1)(x+1)=2.8\)
\(\Rightarrow(x+1)^2=16\)
\(\Rightarrow(x+1)^2=4^2\)
\(\Rightarrow x+1=4\)
\(\Rightarrow x=4-1\)
\(\Rightarrow x=3\)
\(a,x-(\frac{50x}{100}+\frac{25x}{200})=11\frac{1}{4}\)
\(\Rightarrow x-\frac{50x+25x}{100}=\frac{45}{4}\)
\(\Rightarrow\frac{100x}{100}-\frac{75x}{100}=\frac{45}{4}\)
\(\Rightarrow\frac{100x-75x}{100}=\frac{1125}{100}\)
\(\Rightarrow25x=1125\)
\(\Rightarrow x=45\)
\(b,(x-5)\frac{30}{100}=\frac{200x}{100}+5\)
\(\Rightarrow\frac{30x}{100}-\frac{3}{2}=\frac{200x}{100}+5\)
\(\Rightarrow\frac{30x}{100}-\frac{200x}{100}=5+\frac{3}{2}\)
\(\Rightarrow\frac{-170x}{100}=\frac{13}{2}\)
\(\Rightarrow\frac{-170x}{100}=\frac{650}{100}\)
\(\Rightarrow-170x=650\)
\(\Rightarrow x=\frac{-65}{17}\)
Tìm x:
a) x - (\(\frac{50x}{100}\) + \(\frac{25x}{100}\)) = \(11\frac{1}{4}\)
b) (x-5) . \(\frac{30}{100}\) = \(\frac{200x}{100}\) + 5
- Help me!.
Tìm x;y thuộc N:
a/ \(\frac{4}{x}\)- \(\frac{y}{3}\)= \(\frac{5}{6}\)
b/ ( x-5) . \(\frac{30}{100}\)= \(\frac{200x}{100}\)+ 5
a) xy-3x-y=0
b)Làm sao cho \(\frac{10}{x+7}\)đạt tối giản
c) Cho \(A=\frac{-5x}{21}+\frac{-5y}{21}+\frac{-5z}{21}\) biết x+y=-z
d) Cho \(A=\frac{10^{2004}+1}{10^{2005}+1}\)và\(B=\frac{10^{2005}+1}{10^{2006}+1}\)So sánh A và B
e) \(x-\left(\frac{50x}{100}+\frac{25x}{200}\right)=11\frac{1}{4}\)
f)\(\left(x-5\right)\times\frac{30}{100}=\frac{200x}{100}+5\)
Cái này thực ra là lớp 6 mik ko chọn được Các bạn làm đầy đủ công thức và phép toán nha mình cần gấp
Tìm x:
a) x - (\(\frac{50x}{100}+\frac{25x}{200}\)) = \(11\frac{1}{4}\)
b) (x - 5) . \(\frac{30}{100}\) = \(\frac{200x}{100}\) + 5
Tìm số tự nhiên x, biết: \(\left(x-5\right)\frac{30}{100}=\frac{20x}{100}+5\)
Ta có: \(\left(x-5\right)\frac{30}{100}=\frac{20x}{100}+5\)
\(\Rightarrow\left(x-5\right)\frac{3}{10}=\frac{x}{5}+5\)
\(\Rightarrow\frac{3x-15}{10}=\frac{25+x}{5}\)
\(\Rightarrow5\left(3x-15\right)=10\left(25+x\right)\)
\(\Rightarrow15x-75=250+10x\)
\(\Rightarrow15x-10x=250+75\)
\(\Rightarrow5x=325\Rightarrow x=\frac{325}{5}=65\)
\(\left(x-8\right).\frac{3}{10}=\frac{1}{5}x+5\)
\(\frac{3}{10}x-\frac{3}{2}=\frac{1}{5}x+5\)
\(\frac{3}{10}x=\frac{1}{5}x+6,5\)
\(\Rightarrow\frac{1}{10}x=6,5\)
\(x=\frac{6,5}{\frac{1}{10}}\)
\(x=65\)
Vậy \(x=65\)
Tìm x,biết:
a) \(\frac{1}{2}.\left(2x+3\right)-\frac{1}{3}\left(5-3x\right)=\frac{3}{2}x+7\)
b) \(30.\left(2+x\right)-6.\left(x-5\right)-24.x=100\)