( 19x + 2.52 ) : 14= (13 - 8)2 - 4 tìm x
Tìm x
(19x+2.52) :14= (13-8)2 - 42
\(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\)
\(\Rightarrow\left(19x+50\right):14=5^2-4^2\)
\(\Rightarrow\left(19x+50\right):14=9\)
\(\Rightarrow19x+50=126\)
\(\Rightarrow19x=76\)
\(\Rightarrow x=4\)
Vậy x = 4
#Kễnh
Tìm số tự nhiên x biết
a) (19x + 2.52):14 = (13 – 8)2 – 42
b) 2.3x = 10.312 + 8.274
help meeeeeeeeeeee
a, ( 19x + 2.52 ) : 14 = ( 13 - 8 )2 - 42
( 19x + 2.52 ) : 14 = ( 13 - 8 )2 - 16
( 19x + 2.52 ) : 14 = 52 - 16
( 19x + 2.52 ) : 14 = 25 - 16
( 19x + 2.52 ) : 14 = 9
( 19x + 2.25 ) : 14 = 9
( 19x + 2.25 ) = 9 . 14
( 19x + 2.25 ) = 126
( 19x + 50 ) = 126
19x = 126 - 50
19x = 76
x = 76 : 19
x = 4
Vậy x = 4
b, 2 . 3x = 10 . 312 + 8 . 274
2 . 3x = 10 . 274 + 8 . 274
2 . 3x = 274 . ( 10+8 )
2 . 3x = 274 . 18
2 . 3x = 9565938
3x = 9565938 : 2
3x = 4782969
3x = 314
=> x = 14
Vậy x = 14
Đây nha bạn!!!
Chúc bạn học tốt!!!
a, ( 19x + 2.52 ) : 14 = ( 13 - 8 )2 - 42
( 19x + 2.52 ) : 14 = ( 13 - 8 )2 - 16
( 19x + 2.52 ) : 14 = 52 - 16
( 19x + 2.52 ) : 14 = 25 - 16
( 19x + 2.52 ) : 14 = 9
( 19x + 2.25 ) : 14 = 9
( 19x + 2.25 ) = 9 . 14
( 19x + 2.25 ) = 126
( 19x + 50 ) = 126
19x = 126 - 50
19x = 76
x = 76 : 19
x = 4
Vậy x = 4
b, 2 . 3x = 10 . 312 + 8 . 274
2 . 3x = 10 . 274 + 8 . 274
2 . 3x = 274 . ( 10+8 )
2 . 3x = 274 . 18
2 . 3x = 9565938
3x = 9565938 : 2
3x = 4782969
3x = 314
=> x = 14
Vậy x = 14
Tìm số tự nhiên x biết
a) (19x + 2.52):14 = (13 – 8)2 – 42
b) 2.3x = 10.312 + 8.27
ai rảnh giúp mk với nhé
a) \(\left(19x-2.52\right):14=\left(13-8\right).2-42\)
\(\left(19x-50\right):14=10-42\)
\(\left(19x-50\right):14=-32\)
\(19x-50=-448\)
\(19x=-398\)
\(x=-\dfrac{398}{19}\)
Bài 5.Tìm x N, sao cho:
a)3636 : (12x –91) = 36
b)(x : 23 + 45) . 67 = 8911
c)[(6x –39) : 7]. 4 = 12
d)(3x –24). 73= 2. 74
e)x(x –10) = 0
f)(x+ 1). (x –2) = 0
g)(9 –x)3= 64
h)3x= 81
i)2 . 3x= 10 . 312+ 8 . 312
j)(19x + 2.52) : 14 = (13 -8)2-42
\(a,\Rightarrow12x-91=101\\ \Rightarrow12x=192\\ \Rightarrow x=16\\ b,\Rightarrow x:23+45=133\\ \Rightarrow x:23=88\\ \Rightarrow x=\dfrac{88}{23}\\ c,\Rightarrow\left(6x-39\right):7=3\\ \Rightarrow6x-39=21\\ \Rightarrow6x=60\\ \Rightarrow x=10\\ d,\Rightarrow3x-24=\dfrac{148}{73}\\ \Rightarrow3x=\dfrac{1900}{73}\\ \Rightarrow x=\dfrac{1900}{219}\\ e,\Rightarrow\left[{}\begin{matrix}x=0\\x=10\end{matrix}\right.\\ f,\Rightarrow\left[{}\begin{matrix}x=-1\\x=2\end{matrix}\right.\\ d,\left(9-x\right)^3=64=4^3\\ \Rightarrow9-x=4\\ \Rightarrow x=5\\ h,\Rightarrow x=27\\ i,\Rightarrow6x=312\cdot12=624\cdot6\\ \Rightarrow x=624\\ j,\Rightarrow\left(19x+104\right):14=25-42=-17\\ \Rightarrow19x+104=-238\\ \Rightarrow19x=-342\\ \Rightarrow x=-18\)
a) 3+2x-1 = 24 - [ 42-(22-1) ]
b) (19x+2.52):14 = (13-8)2-42
a) 3+2x-1 = 24 - [ 42-(22-1) ]
b) (19x+2.52):14 = (13-8)2 - 42
\(a,\Rightarrow2^{x-1}=24-\left(16-3\right)-3\\ \Rightarrow2^{x-1}=24-13-3\\ \Rightarrow2^{x-1}=8=2^3\\ \Rightarrow x-1=3\Rightarrow x=4\\ b,\Rightarrow\left(19x+50\right):14=25-16=9\\ \Rightarrow19x+50=126\\ \Rightarrow x=4\)
Tìm x
$( 19x + 2 . 5^{2}$ ) ; 14 = $( 13 - 8 )^{2}$ - $4^{2}$
`( 19x + 2*5^2 ) : 14 = ( 13-8)^2 - 4^2`
`=> ( 19x + 50 ) : 14 = 5^2 - 4^2`
`=> ( 19x + 50 ) : 14 = 9`
`=> 19x + 50 = 9*14`
`=> 19x + 50 = 126`
`=> x = ( 126 - 50 )/19`
`=> x = 4`
Vậy `x=4`
(19x + 2.5\(^2\) ) : 14 = 5\(^2\)- 4\(^2\)
(19x + 2.5\(^2\) ) : 14 = 9
19x + 2.5\(^2\) = 9.14
19x + 50 = 126
19x = 126-50=76;19
x = 4
(19x+2.52):14=(13-8)2-42
(19x+2.25):14=52-42
(19x+50):14=25-16
(19x+50):14=9
19x+50=9.14
19x+50=126
19x =126-50
19x =76
x =76:19
x =4
tìm x biết : ( 19x + 2.5^2 ) : 14 = ( 13 - 8 ) ^ 2 - 4 ^2
( 19x + 2.52 ) : 14 = ( 13 - 8 )2- 4 2
( 19x + 2.52 ) : 14 = 52- 4 2
( 19x + 2.52 ) : 14 = 25- 16
( 19x + 2.52 ) : 14 =9
( 19x + 50 ) : 14 =9
19x + 50=9 . 14
19x + 50=126
19x=126-50
19x=76
x=76:19
x=4
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gan gon hon nha
(19x+2*5^2)/14=(13-8)^2-4^
(19x+2*25)/14=(13-8)^2-16
(19x+2.25)/14=5^-16
(19x+2.25)/14=25-16
(19+2.25)=9*14
19X=126+50
x=76/19
x=4
Tìm x biết (19x+25^2)/14=(13-8)^2-4^2