Tìm x
A) 461+(x-45)=387
B) 2x-8=x+4
C) 11-(-53+x) =97
D) 2.|x-5|-16=0
E) |x|-8=4
Tim x
a) 461+(x-45)=387
b) 11-(-53+x)=97
c) -(x+84)+213= -16
d) |x+3|=7
e) |x-5|=(-5)+8
giai ho di ,phan nao cung duoc
a,461+(x-45)=387
=>x-45=387-461
=>x-45=-74
=>x=-74+45
x=-29
a, 461 + ( x - 45 ) = 378
( x - 45 ) = 461 - 378
( x - 45 ) = 83
x = 83 - 45
x = 38
a)461+(x-45)=387
(x-45)=387-461
(x-45)=-74
x =-74+45
x =-29
b)11-(-53+x)=97
(-53+x)=11-97
(-53+x)=-86
x =-86--53
x=-33
c)-(x+84)+213=-16
-(x+84) =-16-213
-(x+84) =-229
-x =-229--313
-x =-84
x =84
d|x+3|=7
x+3=7 hoac x+3=-7
x=7-3 x =-7-3
x=4 x =-10
e)|x-5|=(-5)+8
|x-5|=3
x+5=3 hoac x+5=-3
x =3-5 x =-3-5
x =-2 x =-8
461 + (x - 45 ) = 387
11 - (-53 +x) = 97
- ( x+84 ) + 213 = -16
tìm x
461 + (x - 45) = 387
x - 45 = 387 - 461
x - 45 = -74
x = -74 + 45
x = -29
11 - (-53 + x) = 97
-53 + x = 11 - 97
-53 + x = -86
x = -86 - -53
x = -33
- (x+84) + 213 = -16
x - 84 + 213 = -16
x - 84 = -16 - 213
x - 84 = -229
x = -229 + 84
x = -145
461 + ( x - 45 ) = 387
x - 45 = 387 - 461
x - 45 = - 74
x = - 74 + 45
x = - 29
Vậy x = - 29
11 - ( - 53 + x ) = 97
- 53 + x = 11 - 97
- 53 + x = - 86
x = - 86 - ( - 53 )
x = - 33
Vậy x = - 33
1: thực hiện phép tính
a)53-76-[-76-(-53)]
b)-87-12-(-48)+(-512)0
c)2+22+23+.....+2100
2 tìm xϵz,biết
a) (x-1)2=1
b)(x+1)3=-1
c)105-(135-7x):9=97
d)(x+7).(3-x)>0
e)3x-3-32=2.32
g)(2x2+1).(4-2x)=0
giúp nhoa
Bài 2:
a: =>x-1=1 hoặc x-1=-1
=>x=2 hoặc x=0
b: =>x+1=-1
hay x=-2
c: =>(135-7x):9=8
=>135-7x=72
=>7x=63
hay x=9
d: =>(x+7)(x-3)<0
=>-7<x<3
e: \(\Leftrightarrow3^{x-3}=18+9=27\)
=>x-3=3
hay x=6
f: =>4-2x=0
hay x=2
Tìm x biết:
a) 461+(x-45)=387
b) 11-(-53+x) = 97
c) -(x+84)+213=-16
Tím x biết:
a, 461+(x-45)=387
b, 11-(-53+x)=97
c, -(x+84)+213=-16
d, 2. (x-5)-3(x-4)=-6-15.(-3)
e, 15-(4-x)=6
j, -30+(25-x)=-1
g,(2x-5)+17=6
h, 10-2(4-3x)=-4
i,-12+3(-x+7)=-18
k,24:(3x-2)=-3
l,-45:5.(-3-2x)=3
m, 3x+27=9
giúp mik đi mà, gấp lắm, mik phải đi học ngay r, huhuhu
461+(x-45)=387
11-(-53+x)=97
-(x+84)+213=-16
a) 461+x-45=387
<=> 416+x=387
<=> x= -28
b) 11+53-x=97
<=> 64-x=97
<=>x=-33
c) -x-84+213=-16
<=>-x+129=-16
<=> x=145
1.Tìm x∈Z, biết:
a)461+(x-45)=387
b)-12(x-5)+7(x-3)=5
c)11-(-53+x)=97
d)-(x+84)+213= -16
a) 461+(x-45)=387
<=>461+x-45=387
<=>416+x =387
<=>x =387-416
<=>x =-29
b) -12(x-5)+7(x-3) =5
<=>-12x+60+7x-21=5
<=>-5x+39 =5
<=>-5x =5-39
<=>-5x =-34
<=>x =(-34):(-5)=6,8
c) 11-(-53+x)=97
<=>11+53-x =97
<=>64-x =97
<=>x =64-97=-33
Tìm x,biết:
a.461+(x-45)=387
b.11-(-53+x)=97
c.(x-2)(5-x)=0
e.(x-1)(x2+1)=0
a,461+(x-45)=387
x-45=387-461
x-45=-74
x=-74+45=-29
b,11-(-53+x)=97
-53+x=11-97
53+x=-86
x=-86-53=-139
c,x=2 hoặc x=5
e,x=1
timx
461+(x-45)=387
11-(-53+x)=97
-(x-840+213=-16