tim x biet
2x+6=128
tim x biet
2x - \(\dfrac{3}{4}\) = x+ \(\dfrac{1}{3}\) . \(\dfrac{-9}{2}\)
help
\(2x-\dfrac{3}{4}=x+\dfrac{1}{3}\cdot\dfrac{-9}{2}\)
\(\Rightarrow2x-x=\dfrac{1}{3}\cdot\dfrac{-9}{2}+\dfrac{3}{4}\)
\(\Rightarrow x=-\dfrac{3}{2}+\dfrac{3}{4}\)
\(\Rightarrow x=-\dfrac{6}{4}+\dfrac{3}{4}=-\dfrac{3}{4}\)
#\(Toru\)
a, tim x; 2*(x-1)6=128
b,x2=x
=> (x - 1)2 = 64 => (x - 1)2 = 82 => x - 1 = 8 => x = 9
b/ => x2 - x = 0
=> x(x - 1) = 0
=> x = 0 hoặc x - 1 = 0 => x = 1
a) 2 . (x - 1)2 = 128
(x - 1)2 = 64 = + 8
=> x = 9 hoặc x = -7
b) x2 = x
<=> x \(\in\) {0; -1; 1}
123*X+128*X+1996=16052
TIM X?
< = > 251x + 1996 = 16052
251x = 16052 - 1996 = 14056
x = 14056/251 = 56
x*(123+128)=16052-1996
x*251=14056
x=14056:251
x=56
123*X+128*X+1996=16052
=> (123+128)*X=16052-1996
<=> 251*X=14056
=> X=14056/251
<=> X=56
tim x
128-3*(x+4)=23
128-3*(x+4)=23
3*(x+4)=128-23=105
x+4=105/3=35
x=31
tim x biet
128 - 3 ( x + 4 )=25 - 2
( 15 - 6 x ) =3
24 + 5 nhân x = 49
219 - 7 ( x + 1 ) = 100
ai nhanh mk tick
kb nha
128 - 3.(x+4) = 25-2
128 - 3.x - 12 = 23
128 - 12 -3.x = 23
116 - 3.x = 23
3.x = 93
x = 31
các bài còn lại bn dựa vào phần a mak lm nha!
128-3(x+4)=25-2
128-3(x+4)=23
3(x+4)=128-23
3(x+4)=105
(x+4)=105:3
x+4=35
x =35-4
x =31
128 - 3(x + 4) = 25 - 2
=> 128 - 3(x + 4) = 23
=> 3(x + 4) = 128 - 23
=> 3(x + 4) = 105
=> x + 4 = 105 : 3
=> x + 4 = 35
=> x = 35 - 4
=> x = 31
vậy_
15 - 6x = 3
=> 6x = 15 - 3
=> 6x = 12
=> x = 12 : 6
=> x = 2
vậy_
24 + 5x = 49
=> 5x = 49 - 24
=> 5x = 20
=> x = 20 : 5
=> x = 4
vậy_
219 - 7(x + 1) = 100
=> 7(x + 1) = 219 - 100
=> 7(x + 1) = 119
=> x + 1 = 119 : 7
=> x + 1 = 17
=> x = 17 -1
=> x = 16
vậy_
tim x biet:
16^x<128^4
16x < 1284
24x < 228
=> 4x < 28
=> x < 7
\(16^x< 128^4\)
\(\Rightarrow\left(2^4\right)^x< \left(2^7\right)^4\)
\(\Rightarrow2^{4x}< 2^{4.7}\)
\(\Rightarrow4x< 4.7\)
\(\Rightarrow x< 7\)
tim x biet: 2x.4=128
tim x biet 128<x<150 x la so tron chuc
trả lời :
x = 140
~HT~
bai 3 : tim x
6 nhan ( x+9845 ) = 29042 nhan 6
(x chia 3) nhan 8 = 8 nhan 3198
bai 7 : tim x
191+ x + 9 = 43 nhan 5
x nhan 25 nhan 4 = 125 nhan 8
bai 8 : tim x
128 nhan x - 12 nhan x - 16 nhan x = 5208000
x nhan 27 + x nhan 30 + x nhan 43 =210500
Lời giải đầy đủ:
Bài 3:tìm x
A,
6.(x+9845)=29042.6
(x+9845)=29042.6:6
x+9845=29042
x=29042-9845
x=19197.
B,
(x:3).8=8.3198
(x:3)=3198.8:8
x:3=3198
x=3198.3
x=9594.
Bài 7:
A/191+x+9=43.5
200+x=215
x=215-200
x=15.
B/x.25.4=125.8
x.100=1000
x=1000:100
x=10.
Bài 8:
A/ 128.x-12.x-16.x=5208000
(128-12-16).x=5208000
100.x=5208000
x=5208000:100
x=52080.
B/ x.27+x.30+x.43=210500
x.(27+30+43)=210500
x.100=210500
x=210500:100
x=2105.
K mình nhé!