Tìm x .
48 : 24 - x = 1. 124 -2 × ( x + 3 ) = 24
Tìm X biết: 124 : X + 24 : X – 48 : X = 25.
124 : x + 24 : x - 48: x = 25
( 124 + 24 - 48 ) : x = 25
100 : x = 25
x = 4
\(124\div x+24\div x-48\div x=25\)
\(\Leftrightarrow\left(124+24-48\right)\div x=25\)
\(\Leftrightarrow100\div x=25\)
\(\Leftrightarrow x=100\div25=4\)
124/x + 24/x - 48/x =25
=>(124 + 24 - 48)/x=25
=>100/x=25
=>x=4
124 : x cộng 24 :x trừ 48 :xbằng 25
124 : x + 24 : x - 48 : x = 25
(124 + 24 - 48) : x = 25
100 : x = 25
x = 100 : 25
x = 4
124 : x cộng 24 :x trừ 48 :xbằng 25
\(124:x+24:x-48:x=25\)
\(\left(124+24-48\right):x=25\)
\(100:x=25\)
\(x=100:25\)
\(x=4\)
Bµi 1 1 37064 – 64 x 82 42966 217 2 320 – 120.5 95,25 5,25 874 12 x 12,53 132 x 9 132 4 48 x 17 48 x 3 5 56 x 27 56 x 35 62 6 45 x 48 – 90 x 24 145 7 754 x 75 – 2262 x 25 4568 8 1050 15 – 350 5 1769 4320 9 – 8640 18 750 10 316 192 384 321 108 11 24 25 26 ….. 124 125 126 12 154 – 153 152 – 151 150 – 149 ….. 4 – 3 2 – 113 37 x 38 – 19 x 74 1000 14 0.48 x 500 – 2.4 x 40 x 2
Tìm x biết :
a) | 45 + x | + x = -15
b) | x + 2 | - 6x = 1
c ) | x - 3 | + | x + 3 | = 7
d) 3 | 4 x - 1 | - 2 = 19
e) x - 28 - 124 / 2011 + x -1 24 - 2014 / 28 + x - 2014 - 28 / 124 = 3
1.tìm x
a) 4.(2x + 7) - 3.(3x - 2) = 24
b) 2.(x - 1) + 3.(x - 2) = x - 4
c) [124 - (20 - 4x)] : 30 + 7 = 11
a. 4(2x+7)-3(3x-2)=24
=> 8x+28-9x+6=24
=> -x+34=24
=> -x=-10=> x=10
b. 2(x-1)+3(x-2)=x-4
=> 2x-2+3x-6=x-4
=> 5x-8=x-4
=> 5x-x=-4+8
=> 4x=4=> x=1
c. [124-(20-4x)]:30+7=11
=> (124-20+4x):30=4
=> (104+4x):30=4
=> 104+4x=120
=> 4x=96 => x=24
X(x-y)+y(y-x) với x=124,y=24,z=2
(x-3)^2-(x+1)^3+12x(x-1) với x=-1/2
\(x\left(x-y\right)+y\left(y-x\right)=x\left(x-y\right)-y\left(x-y\right)\)
\(=\left(x-y\right)\left(x-y\right)=\left(x-y\right)^2=\left(124-24\right)^2=100^2=10000\)
\(\left(x-3\right)^2-\left(x+1\right)^3+12x\left(x-1\right)=\frac{49}{4}-\frac{1}{8}+\frac{\left(-6\right).\left(-3\right)}{2}\)
\(=\frac{97}{8}+9=\frac{169}{8}\)
X(X-Y)+Y(Y-X)=X2 -XY +Y2 -XY=(X-Y)2 =(124-24)2 =1002 =10000
(x-3)2 -(x+1)3 +12x(x-1)=x2 -6x+9-x3 -3x2 -3x-1+12x2 -12x=-x3 +10x2 -9x+8
tìm x biết:
\(\frac{x-28-124}{2011}+\frac{x-24-2011}{28}+\frac{x-2011-28}{124}=3\)
\(\left(4x-1\right)^2=\left(1-4x\right)^4\)
b) (4x -1)2 = (1-4x)4 (1)
Vì (1 - 4x) = (4x - 1)
\(\Rightarrow\)(1 - 4x)4 = [ -( 4x -1)4 ]
Vì (1-4x)4 = ( 4x - 1)4
Do đó (1) có dạng :
(4x - 1)2 = (4x - 1)2
Đặt 4x - 1 = x, ta có :
x2 = x4
x2 ( 1 - x2 ) = 0
\(\Rightarrow\)\(\orbr{\begin{cases}x=0\\x^2=\orbr{\begin{cases}1^2\\\left(-1\right)^2\end{cases}}\end{cases}}\)\(\Leftrightarrow\)\(\orbr{\begin{cases}x=0\\x=\orbr{\begin{cases}x=1\\x=-1\end{cases}}\end{cases}}\)
Thay x = 4x -1 = 0
x = \(\frac{1}{4}\)
x = 1 \(\Leftrightarrow\) 4x - 1 = 1x = \(\frac{1}{2}\)
x = -1 \(\Leftrightarrow\) 4x -1 = -1x = 0
Vậy x = \(\frac{1}{2}\) hoặc x = 0
Tìm x, biết:
x - (48 - 24 x 2 : 6 - 3 ) = 0
x - ( 48 - 24 x 2 : 6 - 3 ) = 0
x = 48 - 24 x 2 : 6 - 3
x = 48 - 48 : 6 - 3
x = 48 - 8 - 3
x = 40 - 3
x = 37
Vậy x = 37
Tham khảo nha !!!
x-(48-48:6-3)=0
x-(48-8-3)=0
x-37=0
x=0+37
x=37
Ta có : x - (48 - 24 x 2 : 6 - 3 ) = 0
=> x = 48 - 24 x 2 : 6 - 3
=> x = 48 - 8 -3
=> x = 40-3
=> x = 37
Vậy ...............
Tìm x biết
x - 6 : 2 - ( 48 - 24 ) : 2 : 6 + 3 = 0
x - 6:2-(48-24):2:6+3 = 0
x- 3 - 24 :2:6+3=0
x-3-2+3 = 0
x-3-2 = 0+3
x-3-2=3
x-3=3+2
x-3=5
x=5+3
x=8
x - 6 : 2 - ( 48 - 24 ) : 2 : 6 + 3 = 0
x - 6 : 2 - 24 : 2 : 6 + 3 = 0
x - 3 - 12 : 6 + 3 = 0
x - 3 - 2 + 3 = 0
x - 3 - 2 =0-3
x - 3 - 2 =-3
x - 3=-3+2
x - 3=-1
x=-1+3
x=2