Tìm x
a. 1125 : 319 - x = 5
b. 1032 : ( x : 4 ) = 6
Tìm x a. 1125 : 319 - x = 5 b. 1032 : ( x : 4 ) = 6
tìmX
a) 1032:(X:4)=6
b) 1125:(319_X)=5
a) 1032:(x:4)=6 b)1125:(319_x)=5
319_x=1125:5
319_x=225
x:4=1032:6 x=319_225
x=94
x:4=172 Vậy x=94
x=172:4
x=43
vậy x=43
Bài 2 : Tìm x
8 x ( 168 : x ) = 672
1125 : ( 319 - x ) = 5
1125:(319:x)=5. Giúp em với.
319 : x = 1125 : 5
319 :x = 225
x = 319 : 225
x = 1
1 125 : ( 319 : x ) = 5
319 : x = 1 125 : 5
319 : x = 225
x = 319 : 225
x = 1,417 ( du 175 )
1125 : ( 319 : x ) = 5
319 : x = 1125 : 5
319 : x = 225
x = 319 : 225
x = 1 ( dư 94 )
Học tốt ^^
Tìm x
a. x/15=2/5
b. 3/x-7=27/135
c. 3/4:x + 1/2:1/4=4
a: x=2/5*15=6
b: =>x-7=15
=>x=22
c: =>3/4:x+1/2*4=4
=>3/4:x=4-2=2
=>x=3/8
Bài 1: Tìm x
a) (x-4)2-(x-3)(x+3)=5
b) 2x2+4x+2-2y2=0
a: \(\left(x-4\right)^2-\left(x-3\right)\left(x+3\right)=5\)
\(\Leftrightarrow x^2-8x+16-x^2+9=5\)
\(\Leftrightarrow-8x=-20\)
hay \(x=\dfrac{5}{2}\)
Bài 2: Tìm x
A) 2x+5/2=-3/5
B) 1/2:x-5/6=-2/3
C) (312-x):12,6=24,5
\(a,2x+\dfrac{5}{2}=-\dfrac{3}{5}\)
\(2x=-\dfrac{3}{5}-\dfrac{5}{2}\)
\(2x=-\dfrac{31}{10}\)
\(x=-\dfrac{31}{10}:2\)
\(x=-\dfrac{31}{20}\)
\(b,\dfrac{1}{2}:x-\dfrac{5}{6}=-\dfrac{2}{3}\)
\(\dfrac{1}{2}:x=-\dfrac{2}{3}+\dfrac{5}{6}\)
\(\dfrac{1}{2}:x=\dfrac{1}{6}\)
\(x=\dfrac{1}{2}:\dfrac{1}{6}\)
\(x=3\)
\(c,\left(312-x\right):12,6=24,5\)
\(312-x=24,5\times12,6\)
\(312-x=308,7\)
\(x=312-308,7\)
`x=3,3`
a: =>2x=-3/5-5/2=-6/10-25/10=-31/10
=>x=-31/20
b: =>1/2:x=-2/3+5/6=5/6-4/6=1/6
=>x=1/2:1/6=3
c: =>312-x=308,7
=>x=3,3
mình cần gấp
tìm x
a)|x-3/4|=1/5
b)-1/3+|x|=0,5
giúp mình nha
a: \(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{3}{4}=\dfrac{1}{5}\\x-\dfrac{3}{4}=-\dfrac{1}{5}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{19}{20}\\x=\dfrac{11}{20}\end{matrix}\right.\)
\(a,\left|x-\dfrac{3}{4}\right|=\dfrac{1}{5}\)
\(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{3}{4}=\dfrac{1}{5}\\x-\dfrac{3}{4}=\dfrac{-1}{5}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{19}{20}\\x=\dfrac{11}{20}\end{matrix}\right.\)
\(b,\dfrac{-1}{3}+\left|x\right|=0,5\)
\(\Leftrightarrow\left|x\right|=\dfrac{5}{6}\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{5}{6}\\x=\dfrac{-5}{6}\end{matrix}\right.\)
bài 1 tìm x
a 12-5x=35:5
b 4-2(1-x)=23:4
\(a,12-5x=35:5\\12-5x=7\\5x=12-7\\5x=5\\x=5:5\\x=1\\b,4-2(1-x)=2^3:4\\\\4-2(1-x)=8:4\\4-2(1-x)=2\\2(1-x)=4-2\\2(1-x)=2\\ 1-x=2:2\\1-x=1\\ x=1-1\\ x=0\)