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a) ( x + 216 ) : 61 + 1 = 202
( x + 216 ) : 61 = 201
( x + 216 ) = 12261
x = 12045
b) 1818 : ( 6x - 37 ) + 1 = 19
1818 : ( 6x - 37 ) = 18
( 6x - 37 ) = 101
6x = 138
x = 23
c) ( x : 23 + 45 ) x 67 + 3 = 8914
( x : 23 + 45 ) x 67 = 8911
x : 23 + 45 = 133
x : 23 = 88
x = 2024
(x + 216) : 61 + 1 = 202
=> (x + 216) : 61 = 201
=> x + 216 = 12261
=> x = 12045
vậy_
1818 : (6x - 37) + 1 = 19
=> 1818 : (6x - 37) = 18
=> 6x - 37 = 101
=> 6x = 138
=> x = 23
vậy_
(x : 23 + 45) x 67 + 3 = 8914
=> (x : 23 + 45) x 67 = 8911
=> x : 23 + 45 = 133
=>x : 23 = 88
=> x = 2024
vậy_
a: =>31-x=60
=>x=-29
b: =>(x-140):35=280-270=10
=>x-140=350
=>x=490
c: =>(1900-2x):35=48
=>1900-2x=1680
=>2x=220
=>x=110
d: =>\(2^{2x-1}=2^9\cdot2=2^{11}\)
=>2x-1=11
=>x=6
e: =>(x+2)^5=4^5
=>x+2=4
=>x=2
f: =>3x-4=0 hoặc x-1=0
=>x=4/3 hoặc x=1
g: =>(2x-1)^2=49
=>2x-1=7 hoặc 2x-1=-7
=>x=-3 hoặc x=4
h: =>x(x+1)/2=78
=>x(x+1)=156
=>x=12
a/ 1818 : (6x - 37) = 18
6x- 37 = 101
6x = 138
x= 23
b/ (x : 23 + 45) . 67 = 8911
x : 23 + 45 = 133
x: 23 = 88
x = 2024
1)\(x-105:21=15\)
\(x-5=15\)
\(x=15+5\)
\(x=20\)
Vậy \(x=20.\)
2)\(\left(x-105\right):21=15\)
\(\left(x-105\right)=15.21\)
\(x-105=315\)
\(x=315+105\)
\(x=420\)
Vậy \(x=412.\)
4)\(1818:\left(6x-37\right)=18\)
\(6x-37=1818:18\)
\(6x-37=101\)
\(6x=101+37\)
\(6x=138\)
\(x=138:6\)
\(x=23\)
Vậy \(x=23.\)
m , Ta có : \(\left(1900-2.x\right):3-32=16\)
\(\Leftrightarrow\frac{1900-2.x}{35}-32=16\)( Nhân hai vế với 35 )
\(\Leftrightarrow1900-2.x-1120=560\)
\(\Leftrightarrow780-2.x=560\)
\(\Leftrightarrow-2.x=560-780\)
\(\Leftrightarrow\) \(-2.x=-220\)
\(\Rightarrow x=110\)
Vậy x = 110
n, Ta có : \(720:\left[41-\left(2.x-5\right)\right]=2^3.5\)
\(\Leftrightarrow720:\left(41-2.x+5\right)=8.5\)
\(\Leftrightarrow720:\left(46-2.x\right)=40\)
\(\Leftrightarrow\frac{720}{46-2.x}=40\)
\(\Leftrightarrow\frac{720}{2.\left(23-x\right)}=40\)
\(\Leftrightarrow\frac{360}{23-x}\)
\(\Leftrightarrow360=40.\left(23-x\right)\)
\(\Leftrightarrow9=23-x\)
\(\Leftrightarrow x=14\)
Vậy x = 14
bài 1
16*25*5*125*2*12
=16*125*125*24
=16*(125*125)*24
=16*15625*24
=6000000
bài 2
a) x+37=121
x =121-37
x =84
b) 31+x+29=189
31+x =189-29
31+x = 160
c)129+x=170
x =170-129
x= 41
d) x-32*27=0
x-32 =0:27
x-32 =0
x =0+32
x =32
e)(x-3)*14=28
x-3 =28:14
x-3 =2
x =2+3
x =5
f) 15*x+2=45
15*x =45-2
15*x =43
x =43:15
x =\(\frac{43}{15}\)
g) (39-x)*32=32
39-x =32:32
39-x =1
x =39-1
x =38
h) (x-27)-145=0
x-27 =0+145
x-27 =145
x =145+27
x =172
chúc bạn học tốt
6.x - 37 = 1818 : 18 x : 23 + 45 = 270
6.x - 37 = 101 x : 23 = 270 - 45
6.x = 101 + 37 x : 23 = 225
6.x = 138 x = 225 x 23
x = 138 : 6 x = 5175
x = 23
a) \(6x-37=1818:18\)
\(\Rightarrow6x-37=101\)
\(\Rightarrow6x=101+37\)
\(\Rightarrow6x=138\)
\(\Rightarrow x=138:6=23\)
b) \(x:23+45=270\)
\(x:23=270-45\)
\(x:23=225\)
\(x=225\cdot23\)
\(x=5175\)
a) (190-2x) : 35 -32 = 16
=> (190-2x) : 35 =16+32
=> (190-2x) : 35 =48
=> 190-2x = 48.35 = 1680
=> 2x = 190-1680 = -1490
=> x = -1490/2= -745
b) (x : 23 + 45) . 37 -22 =2^4.105
=> (x : 23+45).37=2^4.105+22=1702
=> (x : 23 +45) = 1702/37 = 46
=> x : 23 = 46- 45 =1
=> x = 23
a) ( 190 - 2x ) : 35 - 32 = 16
( 190 - 2x ) : 35 =48
190-2x=1680
2x=-1490
x=-745
b) ( x : 23 + 45) . 37 - 22 = 24 . 105
( x : 23 + 45) . 37 - 22 = 1680
( x : 23 + 45) . 37 =1702
x : 23 + 45= 46
x:23=1
x=23
(1900 - 2x) : 35 - 32 = 16
=> (1900 - 2x) : 35 = 48
=> 1900 - 2x = 1680
=> 2x = 220
=> x = 110
vậy_
111 + 1818 : (6x - 37) = 129
=> 1818 : (6x - 37) = 18
=> 6x - 37 = 101
=> 6x = 138
=> x = 23
vậy_
(x : 3 + 45) x 67 - 31 = 8880
=> (x : 3 + 45) x 67 = 8911
=> x : 3 + 45 = 133
=> x : 3 + = 88
=>x = 264
vậy_