TIM x
X : 16 : (\(\frac{3}{10}\). X + \(\frac{5}{2}\)) : X - 3 =17
Những câu hỏi liên quan
Tim x biet
\(\frac{3}{\left(x+2\right)\left(x+5\right)}+\frac{5}{\left(x+5\right)\left(\right)x+10}+\frac{7}{\left(x+10\right)\left(x+17\right)}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
Tìm x :
\(\frac{3}{\left(x+2\right).\left(x+5\right)}+\frac{5}{\left(x+5\right).\left(x+10\right)}+\frac{7}{\left(x+10\right).\left(x+17\right)}=\frac{x}{\left(xx+2\right).\left(x+17\right)}\)
Giúp mk với 
16, giải phương trình.
1, \(\frac{x+5}{65}+\frac{x+10}{60}=\frac{x+15}{55}+\frac{x+20}{50}\)
2, \(\frac{x+91}{81}+\frac{x+92}{82}+\frac{x+93}{83}=3\)
3, \(\frac{59-x}{19}+\frac{58-x}{18}=\frac{57-x}{17}+\frac{56-x}{16}\)
4, \(\frac{x}{15}+\frac{x+1}{16}+\frac{x+2}{17}+\frac{x+3}{18}+\frac{x+4}{19}=5\)
+Tim x : a ) left(x-frac{1}{2}right)^3frac{1}{27} b )left(x+frac{1}{2}right)^2frac{4}{25}c ) left(x+1right)^{x+2}left(x-1right)^{x+6} (x ϵ Z )d ) left(2x+3right)^{2016}left(2x+3right)^{2018}e ) frac{3}{x+2.x+5}+frac{5}{x+5.x+10}+frac{7}{x+10.x+17}frac{x}{x+2.x+17} Với xnotinleft{-2;-5;-10;-17right}
Đọc tiếp
+Tim x :
a ) \(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\)
b )\(\left(x+\frac{1}{2}\right)^2=\frac{4}{25}\)
c ) \(\left(x+1\right)^{x+2}=\left(x-1\right)^{x+6}\) (x ϵ Z )
d ) \(\left(2x+3\right)^{2016}=\left(2x+3\right)^{2018}\)
e ) \(\frac{3}{x+2.x+5}+\frac{5}{x+5.x+10}+\frac{7}{x+10.x+17}=\frac{x}{x+2.x+17}\) Với \(x\notin\left\{-2;-5;-10;-17\right\}\)
\(a\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\\ =>\left(x-\frac{1}{2}\right)=\frac{1}{3}\\ =>x=\frac{1}{3}+\frac{1}{2}\\ =>x=\frac{5}{6}\)
b) \(\left(x+\frac{1}{2}\right)^2=\frac{4}{25}\\ =>\left(x+\frac{1}{2}\right)=\frac{2}{5}\\ =>x=\frac{-1}{10}\)
d) (2x+3)2016=(2x+3)2018 khi 2x+3=0 hoặc 1
Nếu 2x+3=0
=2x=-3 ( loại )
Nếu 2x+3=1
=>2x=-2
=>x=-1 ( thỏa )
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tim x,y,z biet \(\frac{3.X-5.Y}{2}=\frac{5.Y-3.Z}{3}=\frac{3.B}{4};X+Y+Z+17\)=17
Tính bằng cách thuận tiện nhất .
\(\frac{39}{16}:\frac{5}{8}-\frac{17}{16}:\frac{5}{18}+\frac{4}{5}\)
\(\frac{16}{17}x\frac{12}{19}+\frac{16}{17}x\frac{7}{19}-\frac{2}{3}\)
Trả lời
Sửa đề câu a 1 tí
a)39/16:5/8-17/16:5/8+4/5
=(39/16-17/16):5/8+4/5
=11/8:5/8+4/5
=11/5+4/5
=15/5=3
b)16/17.12/19+16/17.7/19-2/3
=16/17.(12/19+7/19)-2/3
=16/17-2/3
=48/56-14/56
=34/56=17/28
Học tốt !
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tính
\(\frac{3}{14}x\frac{5}{17}+\frac{11}{14}x\frac{5}{17}+\frac{12}{17}x\frac{5}{16}+\frac{12}{17}x\frac{11}{16}\)
3/14 × 5/17 + 11/14 × 5/17 + 12/17 × 5/16 + 12/17 × 11/16
= 5/17 × ( 3/14 + 11/14) + 12/17 × ( 5/16 + 11/16)
= 5/17 × 1 + 12/17 × 1
= 5/17 + 12/17
= 1
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3/14 × 5/17 + 11/14 × 5/17 + 12/17 × 5/16 + 12/17 × 11/16
= 5/17 × ( 3/14 + 11/14) + 12/17 × ( 5/16 + 11/16)
= 5/17 × 1 + 12/17 × 1
= 5/17 + 12/17
= 1
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tìm x, biết :
a, \(1-(5\frac{3}{8}+x-7\frac{5}{24}):(-16\frac{2}{3})=0\)
b, \((\frac{1}{24.25}+\frac{1}{25.26}+...+\frac{1}{29.30}).120+x:\frac{1}{3}=-4\)
c, \(1\frac{3}{5}+\frac{\frac{2}{7}+\frac{2}{17}+\frac{2}{37}}{\frac{5}{7}+\frac{5}{17}+\frac{5}{37}}.x=\frac{16}{5}\)
tim x
\(\frac{x-90}{10}+\frac{x-76}{12}+\frac{x-58}{14}+\frac{x-36}{16}+\frac{x-15}{17}=15\)
\(\frac{x-90}{10}+\frac{x-76}{12}+\frac{x-58}{14}+\frac{x-36}{16}+\frac{x-15}{17}=0\)
\(\Rightarrow\left(\frac{x-90}{10}-1\right)+\left(\frac{x-76}{12}-2\right)+\left(\frac{x-58}{14}-3\right)+\left(\frac{x-36}{16}-4\right)+\left(\frac{x-15}{17}-5\right)=0\)
\(\Rightarrow\frac{x-100}{10}+\frac{x-100}{12}+\frac{x-100}{14}+\frac{x-100}{16}+\frac{x-100}{17}=0\)
\(\Rightarrow\left(x-100\right).\left(\frac{1}{10}+\frac{1}{12}+\frac{1}{14}+\frac{1}{16}+\frac{1}{17}\right)=0\)
\(\Rightarrow x-100=0\left(Vì\frac{1}{10}+\frac{1}{12}+\frac{1}{14}+\frac{1}{16}+\frac{1}{17}\ne0\right)\)
\(\Rightarrow x=100\)
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may gioi vai