0,5x - \(\frac{2}{3}\) x= \(\frac{7}{12}\)
Những câu hỏi liên quan
tìm x :
0,5x - 3/2x = 3\(0,5x-\frac{3}{2}x=\frac{2}{7}\)
\(0,5x-\frac{2}{3}\)\(x\)=\(\frac{7}{12}\)
Chi tiết 2 tick
x*(5/10-2/3)=7/12
x*-1/6=7/12
x=7/12:-1/6
x=-7/2
làm như vậy đó
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0,5x - \(\frac{2}{3}\)x = \(\frac{7}{12}\)
( \(\frac{3x}{7}\)+ 1 ) : ( -4 ) = \(\frac{-1}{28}\)
Bài 1: Tính:
\(\frac{1}{4}+\frac{7}{12}-\frac{6}{13}-\frac{7}{8}\)
Bài 2: Tìm x:
0,5x - \(\frac{2}{3}\)x = \(\frac{5}{12}\)
Tìm x,biết:
a)\(\frac{4}{7}-x=\frac{1}{3}\)
b)|x-5|=7
c)\(x-\frac{2}{3}=\frac{-6}{7}\)
d)\(\frac{x}{3}=\frac{8}{12}\)
e)\(\frac{2}{3}-1\frac{4}{15}x=\frac{-3}{5}\)
f)\(-2^3+0,5x=1,5\)
g)\(2^{x-1}=16\)
Help!!
a) x=4/7 - 1/3=19/21
b) /x-5/=7 -->x-5=7 hoặc x-5=-7
--> x=12 hoặc x= -2
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a,\(\frac{4}{7}-x=\frac{1}{3}\Rightarrow x=\frac{4}{7}-\frac{1}{3}\)
\(\Rightarrow x=\frac{12}{21}-\frac{7}{21}\Rightarrow x=\frac{5}{21}\)
b,\(\left|x-5\right|=7\Rightarrow\orbr{\begin{cases}x-5=7\\x-5=-7\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=12\\x=-2\end{cases}}\)
c,\(x-\frac{2}{3}=-\frac{6}{7}\Rightarrow x=-\frac{6}{7}+\frac{2}{3}\Rightarrow x=-\frac{4}{21}\)
d,\(\frac{x}{3}=\frac{8}{12}\Rightarrow x=8.3:12=2\)
e,\(\frac{2}{3}-1\frac{4}{15}x=-\frac{3}{5}\Rightarrow1\frac{4}{15}x=\frac{2}{3}+\frac{3}{5}\Rightarrow\frac{19}{15}x=\frac{19}{15}\Rightarrow x=1\)
f,\(-2^3+0,5x=1,5\Rightarrow-8+0,5x=1,5\Rightarrow0,5x=1,5+8\)
\(\Rightarrow0,5x=9,5\Rightarrow x=19\)
g,\(2^{x-1}=16\Rightarrow x-1=4\Rightarrow x=5\)
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tìm x ,biết
a, 0,5x-2/3x=7/12
b, x : 4\(\frac{1}{3}\) = -2,5
c, 5,5x =13/15
d ,{\(\frac{3x}{7}\)+1} : -4 = \(\frac{-1}{28}\)
0,5x-2/3x=7/12
=>(1/2-2/3).x=7/12
=>-1/6x=7/12
=>x=7/12:1/6
=>x=7/2
b, x:4 1/3=-2,5
=>x:13/3=-2,5
=>x=-5/2x13/3
=>x=-13
c,5,5x=13/15
=>11/2x=13/15
=>x=13/15:11/2
=>x=26/165
d,(3x/7+1):-4=-1/28
=>3x/7+1=-1/28x(-4)
=>3x/7+1=-1/7
=>3x/7=-1/7-1
=>3x/7=-8/7
=>3x=-8/7x7
=>3x=8
=>x=8:3
=>x=8/3
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\(0,5x-\frac{2}{3}x=\frac{7}{12}\)
\(\frac{1}{2}x-\frac{2}{3}x=\frac{7}{12}\)
\(\left(\frac{1}{2}-\frac{2}{3}\right)x=\frac{7}{12}\)
\(\frac{-1}{6}x=\frac{7}{12}\)
\(x=-21\)
b,c,d tương tự
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câu trả lời b kết qua bằng -65/6
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tìm x:
\(\left|x\right|-5\frac{3}{7}\times\left|x\right|-\frac{3}{4}=2\times\left|x\right|+\frac{-15}{2}\)
\(50\%+\frac{2}{3}x=x+4\)
\(0,5x-\frac{2}{3}\left(x+1\right)=\frac{-1}{12}\)
\(\frac{1}{2}\left(x-\frac{2}{3}\right)-\frac{2}{5}\left(2-x\right)=\frac{1}{9}\)
1\(|0,5x|=0,5x\)
2\(|\frac{1}{3}x|=\frac{1}{3}x\)
3\(|-\frac{2}{3}|=\frac{2}{3}x\)
4\(|-\frac{1}{5}|=\frac{1}{5}x\)
\(\hept{\begin{cases}\text{|}0,5x\text{|}=0,5x\\\sqrt{\left(0,5x\right)^2}=0,5x\\\left(0,5x\right)^2=\left(0,5x\right)^2\end{cases}}\)
2, tương tự
\(\hept{\begin{cases}\text{|}-\frac{2}{3}x\text{|}=\frac{2}{3}x\\\sqrt{\left(-\frac{2}{3}x\right)^2}=\frac{2}{3}x\\\left(-\frac{2}{3}x\right)^2=\left(\frac{2}{3}x\right)^2\end{cases}}\)
4, tương tự
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tìm x
a) \(2\frac{2}{3}:x=1\frac{7}{9}:2\frac{2}{3}\)
\(-2^3+0,5x=1,5\)
a,
\(2\frac{2}{3}:x=1\frac{7}{9}:2\frac{2}{3}\)
\(\frac{8}{3}:x=\frac{16}{9}:\frac{8}{3}\)
\(\frac{8}{3}:x=\frac{2}{3}\)
\(\frac{8}{3}:\frac{2}{3}=x\)
\(x=4\)
Vậy x = 4
b,
\(-2^3+0,5x=1,5\)
\(-8+0,5x=1,5\)
\(0,5x=1,5+8\)
\(0,5x=9,5\)
\(x=9,5:0,5\)
\(x=19\)
Vậy x = 19
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