\(\Rightarrow\) 1/5-3x = 2/8 : 7/5 = 5/28
\(\Rightarrow\) 3x = 1/5 - 5/28 = 3/140
\(\Rightarrow\) x = 3/140 : 3 = 1/140
\(\Rightarrow\) 1/5-3x = 2/8 : 7/5 = 5/28
\(\Rightarrow\) 3x = 1/5 - 5/28 = 3/140
\(\Rightarrow\) x = 3/140 : 3 = 1/140
Bài 2 : Tìm x biết
a) -0,6 , x - \(\frac{7}{3}\)= 5,4
b) 2,8 : \(\left(\frac{1}{5}-3.x\right)\)= \(1\frac{2}{5}\)
2,8 : (1/5 - 3x) = 1 2/5
Tìm x:
a)\(\left(3x-1\right)\left(-\frac{1}{2}x+5\right)=0\)
b)\(-5\left(x+\frac{1}{5}\right)-\frac{1}{2}\left(x-\frac{2}{3}\right)=\frac{3}{2}x-\frac{5}{6}\)
tìm x
3x(3X--\(\frac{1}{2}\) )3 + \(\frac{1}{9}\)= 0
-5. (x+\(\frac{1}{5}\))--\(\frac{1}{2}\) .( x--\(\frac{2}{3}\))=\(\frac{3}{2}\)x -\(\frac{5}{6}\)
3.(x--\(\frac{1}{2}\) )--5.(x+\(\frac{3}{5}\))=--x+\(\frac{1}{5}\)
Bài 2: Tìm x, biết:
a) \(-0,6.x-\dfrac{7}{3}=5,4\)
b) \(2,8:\left(\dfrac{1}{5}-3.x\right)=1\dfrac{2}{5}\)
Tìm x biết
a,23x +5 + 5 . 2x+1 . 22x+3 + 23x = 904
b,1-( 3\(\frac{2}{5}\)+ x - 4) : 5\(\frac{2}{5}\)= 0
Bài 1: Tìm x, biết:
a, (2x + 3/5)2 = \(\frac{9}{25}\)
b, 3(3x-1/2)3+1/9=0
c, -5(x+1/5)-1/2(x-2/3)=2/3x-5/6
d, 3(x-1/2)-5(x+3/5)=x+1/5
1. Tìm giá trị lớn nhất của:
a) A = 1,7 + |3,4 - x |
b) B = |3x + 8,4| - 14,2
c) C = |x + 2,8| - 3,5
d) D = |x - 2/5 | + 3/7
Bài 1:Tìm số nguyên x ,biết
a, 2(5-x)+5=1-3x
b,\(\frac{x-1}{x+1}=\frac{8}{9}\)