\(\left(2x-4\right)^3=8\\ \Leftrightarrow8\left(x-2\right)^3=8\\ \Leftrightarrow\left(x-2\right)^3=1\\ \Leftrightarrow x-2=1\\ \Leftrightarrow x=3\)
(2x-4)3 = 8
23 = 8
=> (2x-4)3 = 23
=> x = 5
1) Tìm x biết:
a)-(2x-16)-(x-8)=24
b)-3.(-x-4)-x=42-24
c)|2x-4|-16=-8
Tìm x
a.2x+(1+2+3+4+...+100) = 15150
b.(x+1)+(x+2)+(x+3)+(x+4)+(x+5)+(x+6)+(x+7)+(x+8)=36
c.0+0+4+6+8+...+2x=110
Bài 4. Tìm x ∈ N biết:
a) x3 = 27 b) (2x – 1)3 = 8
c) (2x – 3)2 = 9 d) 2x + 5= 3^4 : 3^2
3^4 tức là 3 mũ 4
-(x/2)+2x/3+x+1/4+2x+1/6=3/8
Tìm x
7-(2x-1/3)^2=3
(2x+1/3)^2-3/8=1/8
12:[29-(x-2/3)^2]=3
(3x-1/2)^3+8/3=29/9-14/27
2(2x-1/3)^2+4/3=5/6+13/18
Tìm X
B1:Tìm x
a) (x-7).(x+3)<0
b) (2x+6).(x-5) nhỏ hơn hoặc bằng 0.
B2:Tìm x
a) (5x+8)-(2x-15)+21=2x-5
b) 3.(x-5)-4(x+8)=-12
c) |2x+6|-(-5)^2=3
+. là dấu nhân"x" nhé!
Tìm x, biết:
a) \(\dfrac{-2}{3}\)+ 2x = \(\dfrac{4}{3}\)
b) \(\dfrac{5}{8}\) - 5 : x = \(\dfrac{-3}{8}\)
Tìm x, biết:
a) \(\dfrac{-2}{3}\) + 2x = \(\dfrac{4}{3}\)
b) \(\dfrac{5}{8}\) - 5 : x = \(\dfrac{-3}{8}\)
Tìm STN x, biết
1) (x + 2) - 2 = 0 2) (x + 3) + 1 = 7
3) (3x - 4) + 4 = 12 4) (5x + 4) - 1 = 13
5) (4x - 8) - 3 = 5 6) 3 + (x - 5) = 7
7) 8 - (2x - 4) = 2 8) 7 + (5x + 2) = 14
9) 5 - (3x - 11) = 1 10) 16 - (8x + 2) = 6
