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a) 142+(118-x)=217
118-x =217-142
118-x =75
x =43
b) 818-(x-305)=712
x-305 =818-712
x-305 = 106
x = 411
c)x-32:16=48
x-2 =48
x =50
d)(x-32):16=48
x-32 =48.16
x-32 =768
x = 800
![](https://rs.olm.vn/images/avt/0.png?1311)
(X-3)-120=0
X-123=0
X=123
8x-3=0
8x=3
x=3/8
124+(118-x)=217
118-x=93
x=25
156-(x+61)=82
x+61=74
x=13
814-(x-305)=712
x-305=102
x=407
(X-32)÷16=48
x-32=768
x=800
X-32: 16=48
x-2=48
x=50
( x - 3 ) - 120 = 0
<=> x - 3 = 120
<=> x = 120 + 3
<=> x = 123
8x - 3 = 0
<=> 8x = 3
<=> x = 3 : 8
<=> x = 3/8
124 + ( 118 - x ) = 217
<=> 118 - x = 217 - 124
<=> 118 - x = 93
<=> x = 118 - 93
<=> x = 25
156 - ( x + 61 ) = 82
<=> x + 61 = 156 - 82
<=> x + 61 = 74
<=> x = 74 -61
<=> x = 13
814 -( x - 305 ) = 712
<=> x - 305 = 814-712
<=> x - 305 = 102
<=> x =102 + 305
<=> x = 407
( x - 32) : 16 = 48
<=> x - 32 = 48 x 16
<=> x - 32 = 768
<=> x = 768 + 32
<=> x = 800
x - 32 : 16 = 48
<=> x - 2 = 48
<=> x = 48 + 2
<=> x = 50
![](https://rs.olm.vn/images/avt/0.png?1311)
b) 814-(x-305)=172
x-305=814-172
x =642
x=814-642
x=172
c) x-32:16=48
x-2 =48
x =48+2
x =50
2 phan kia ban tu lam nhe
xong nho an dung cho minh
![](https://rs.olm.vn/images/avt/0.png?1311)
x- 32:16=48
=>x-2=48
=>x=48+2
=>x=50
(x-32):16=48
=>x-32= 48x 16
=>x-32= 768
=>x=768+32
=>x=800
![](https://rs.olm.vn/images/avt/0.png?1311)
7.x-8=718 (x-25)-155=0 124+(118-x)=717 (x-32):16=48
7.x=718+8 x-25=0+155 118-x=717-124 x-32=48.16
7.x=726 x-25=155 118-x=593 x-32=768
x=726:7 x=155+25 x=118-593 x=768+32
x=103,7142857 x=180 x=-475 x=800
![](https://rs.olm.vn/images/avt/0.png?1311)
a.1+3+5+7+...+2x+1=225
[(2x+1-1):2+1]x(2x+1+1):2=225
(x+1)x(2x+2):2=225
(x+1)x(x+1)=225
(x+1)2=225
(x+1)2=152
x+1=15
x=14
_______________
b. 130-[5.(9-x)+43]=47
5.(9-x)+43=83
5.(9-x)=40
9-x=8
x=1
_______________
c.16x<324
24x<220
=>x∈{0;1;2;3;4}
a: =>(x+1)^2=225
=>x+1=15
=>x=14
b: =>[5*(9-x)+43]=130-47=83
=>5(9-x)=40
=>9-x=8
=>x=1
c: =>2^4x<2^20
=>4x<20
=>0<x<5
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) x = 1 6 ; b ) x = − 41 15 ; c ) x = 59 60 ;
d ) x 12 = − 5 12 = > x = − 5 ; e ) x 6 = 31 30 = > x = 31 5
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2.
a, x-13=-46
=>x=(-46)+13
=>x=33
b, 4x-6=22
=>4x=22+6
=>4x=28
=>x=28:4
=>x=7
3.
a, 32=25
48=24.3
=>ƯCLN(32,48)=24=16
16=24
72=23.32
=>ƯCLN(16,72)=23=8
b,
24=23.3
60=22.3.5
=>BCNN(24,60)=23.3.5=120
72=23.32
180=22.32.5
=>BCNN(72,180)=23.32.5=360
Trả lời
a)134+(118-x)=277
118-x =277-134
118-x =143
x =118-143
x =-25
b)x-32:16=48
=>x-2 =48
=>x =48+2
=>x =50
Rất vui khi được giúp bạn !
\(a,134+\left(118-x\right)=277\)
\(134+118-x=277\)
\(252-x=277\)
\(-x=25\)
\(x=-25\)
\(b,x-32:16=48\)
\(x-2=48\)
\(x=50\)