Tìm x
2va1/4 : ( x - 7va1/3) = -1,5
1) Tìm x:
(1,16-x).5,25/(10va5/9 - 7va1/4).2 va 2/17= 75%
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
tim X
a) X-1/8= 2va1/3 nhan 5 va 1/4
b) X:3/2 =1/4
c) 10 va 3/10- x= 4/5
d)x:4/17 = 51
lam nhanh nhanh giup minh
a) x - \(\frac{1}{8}\)= \(\frac{7}{3}\)x \(\frac{21}{4}\)
x - \(\frac{1}{8}\)= \(\frac{49}{4}\)
x = \(\frac{49}{4}\)+ \(\frac{1}{8}\)
x = 98
b) x : \(\frac{3}{2}\) = \(\frac{1}{4}\)
x = \(\frac{1}{4}\)x \(\frac{3}{2}\)
x = \(\frac{3}{8}\)
c) \(\frac{103}{10}\) - x = \(\frac{4}{5}\)
x = \(\frac{103}{10}\)- \(\frac{4}{5}\)
x = \(\frac{19}{5}\)
d) x = 51 x \(\frac{4}{17}\)
x = \(12\)
Vậy chị kết luận ngắn gọn là:
a)=98
b)=3/8
c)=19/5
d)=12
a)3+2*x=15
b) 24- x = 19
c) 29*x-13= 45
d) 5* x-17=38
e) 50-2*(x +1)=20
f ) x-3/20=1/5
g ) 2va1/3:x=4/9
h ) 5/9 - 1/6 * x=2/3
i ) 2* x-3=1/2
a) 3+2*x=15
2x=15-3
2x=12
x=12:2
x=6
Vậy x=6
b) 24-x=19
x=24-19
x=5
Vậy x=5
c) 29x-13=45
29x=45+13
29x=58
x=58:29
x=2
Vậy x=2
d) 5x-17=38
5x=38+17
5x=55
x=55:5
x=11
Vậy x=11
e) 50-2(x+1)=20
2(x+1)=50-20
2(x+1)=30
x+1+30/2
x+1=15
x=15-1=14
Vậy x=14
f)
1va1/8+2va1/12-1/3:7,3-0,4.8,5
8:2va2/5/5va1/4:7:2va1/7:5/7/4:8/9
tính giá trị biểu thức
2va1/7:( -1/4-3/28) - 3 và 1/19
tìm x:
4/5 .x +1/3 = 1,5
\(\dfrac{4}{5}\cdot x+\dfrac{1}{3}=1,5\)
\(\Rightarrow\dfrac{4}{5}\cdot x=1,5-\dfrac{1}{3}\)
\(\Rightarrow\dfrac{4}{5}\cdot x=\dfrac{7}{6}\)
\(\Rightarrow x=\dfrac{7}{6}:\dfrac{4}{5}\)
\(\Rightarrow x=\dfrac{35}{24}\)
Bài 1: Tìm x biết
1) |5x - 3| = |7 - x|
2) 2 |3 x - 1| - 3x = 7
3) |2x + 3| + 4 = -2x
4) |x + 3/4| - 1/3 = 0
5) 1,6 - |x + 1,5| = 0
6) |x - 1,5| + |2,5 - x| = 0
1) \(|5x-3|=|7-x|\)
\(\Leftrightarrow\orbr{\begin{cases}5x-3=7-x\\5x-3=x-7\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}6x=10\\4x=-4\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=\frac{5}{3}\\x=-1\end{cases}}\)
Vậy...
2) \(2.|3x-1|-3x=7\)
\(\Leftrightarrow2.|3x-1|=7+3x\)
\(\Leftrightarrow\orbr{\begin{cases}2.\left(3x-1\right)=7+3x\\2.\left(3x-1\right)=-7-3x\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}6x-2=7+3x\\6x-2=-7-3x\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}3x=9\\9x=-5\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=3\\x=\frac{-5}{9}\end{cases}}\)
Vậy...
5) \(\text{1,6 - |x + 1,5| = 0}\)
\(|x + 1,5| = 1,6-0\)
\(\text{|x + 1,5| = 1,6}\)
\( |x | = 1,6-1,5\)
\(|x|=0,1\)