Tìm x biết
{x-[52-(92-16.5)30.24]3-14}=1
Tìm x, biết: x - {[ 52 - ( 92 - 16.5 )30 . 24]3 + 14} = 1
Ta có x-{[52 - (92 -16.5)30 . 24]3 + 14 } =1
=> x- {[25- ( 81-80) 30 . 24]3 +14 }=1
=> x -{[ 25-(1.24) 3 +14} =1
=> x - (1+14) =1
=> x- 15 =1
=> x=16
Tìm x:
{x-[52 -(92-16.5)30.24]3-14}=1
Tìm x biết :
a) ( x - 273 ) * ( 1 + 3 + + 5 + ... + 2015 ) = 0
b) x/42= 156/42
c) 9/14 - x/7 : 5/3 = 3/14
d) 34/43=374/(x-32)
e) x +145/245 = 52/70
a, X = 273
b, X = 156
c, X = 4
d, X = 505
e, X = \(\frac{37}{245}\)
Tìm x, biết:
a ) 2 | x | + 1 2 = 2 b ) x + 1 2 − 1 6 = 1 c ) 1 4 − x +5 1 8 = 6 1 8 d ) 9 2 − x − 3 4 = − 1 2
a ) x ∈ − 3 4 ; 3 4 b ) x ∈ 2 3 ; − 5 3 ; c ) x ∈ − 3 4 ; 5 4 d ) x ∈ 23 4 ; − 17 4
bài 1: thực hiện phép tính
1) (13.17\(^4\)+4.17\(^4\)):17\(^3\)-(14.\(3^3\)-14.3\(^2\)):9
2) \(2^3\).\(5^2\)-[131-(23-2\(^3\))\(^2\)]
bài 2: tìm x
1) 6\(^2\).x+14.x-3\(^4\)=69
2) 3\(^x\)=81
3) 3. (2x+1)\(^2\)=75
2:
1: =>36x+14x=69+81=150
=>50x=150
=>x=3
2: 3^x=81
=>3^x=3^4
=>x=4
3: 3(2x+1)^2=75
=>(2x+1)^2=25
=>2x+1=5 hoặc 2x+1=-5
=>x=-3 hoặc x=2
1:
1: \(\dfrac{13\cdot17^4+4\cdot17^4}{17^3}-\dfrac{14\cdot3^3-14\cdot3^2}{9}\)
\(=\dfrac{17^4\cdot\left(13+4\right)}{17^3}-\dfrac{14\cdot3^2\left(3-1\right)}{9}\)
\(=17\cdot17-14\cdot2\)
=289-28
=261
2:
\(2^3\cdot5^2-\left[131-\left(23-2^3\right)^2\right]\)
\(=8\cdot25-131+\left(-1\right)^2\)
=69+1
=70
Tìm x, biết
a , ( 9 2 - 2 x ) : 0 , 75 = 1 1 3 b , ( - 1 2 x + 2 3 ) : - 3 7 = 14 5 c , - 2 5 x - 1 50 - 1 4 = 3 4
a , x = 7 4 b , 36 15 c , x = - 2 h o ặ c x = 3
Tìm x, biết:
a ) 9 2 - 2 x : 0 , 75 = 1 1 3 b ) - 1 2 x + 2 3 : - 3 7 = 14 5 c ) - 2 5 x - 1 5 - 1 4 = 3 4
Tìm x thuộc Z
a, x + ( - 42 ) = 92 + ( - 52 )
b, x- 27 = - / 48 / - ( - 72 )
a) x + (-42) = 92 + (-52)
x - 42 = 40
x = 40 + 42
x = 82
b) x - 27 = -|48| - (-72)
x - 27 = -48 + 72
x - 27 = 24
x = 24 + 27
x = 51
a) x + (-42) = 92 + (-52)
x = 92 + (-52 - 42 )
x = 92 + (-92) = 0
x+(-42)=92+(-52)
x+(-42)=40
x =40-(-42)
x =82
tìm x,biết\(\frac{x}{52}=\frac{-14}{72}\)