a) ( x - 25 ) - 110 = 0
b) 124 + ( 118 - x ) = 142
c) 124 - ( 3x + 22 ) = 42
d) x - 32 : 16 = 18
e ) ( x - 32 ) : 16 = 18
f) 294 : ( 19 - 2.x ) = 42
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\(a,\)\(124+\left(118-x\right)=365\)
\(118-x=365-124\)
\(118-x=241\)
\(x=118-241\)
\(x=\left(-123\right)\)
\(b,814-\left(x-305\right)=712\)
\(x-305=814-712\)
\(x-305=102\)
\(x=102+305\)
\(x=407\)
\(c,\)\(x-32\div16=48\)
\(x-2=48\)
\(x=48+2\)
\(x=50\)
\(d,\)\(\left(x-32\right):16=48\)
\(x-32=48.16\)
\(x-32=768\)
\(x=768+32\)
\(x=800\)
(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
a, 124 + (118 - x) =217
118 - x = 217 -124
118 - x = 93
x = 118 - 93
x = 25
Vậy x = 25
b, 814 - (x - 303) =712
x - 303 = 814 - 712
x - 303 = 102
x = 102 + 303
x = 405
Vậy x = 405
c, x - 32 : 16 =48
x - 2 = 48
x = 48 +2
x = 50
Vậy x = 50
d, (x - 32) : 16 = 48
x - 32 = 48 x 16
x - 32 = 768
x = 768 + 32
x = 800
Vậy x = 800
a) 124 + ( 118 - x ) = 217
118 - x = 217 - 124
118 - x = 93
x = 118 - 93
x = 25
b) 814 - ( x - 303 ) = 712
x - 303 = 814 - 712
x - 303 = 102
x = 102 + 303
x = 405
c) x - 32 : 16 = 48
x - 2 = 48
x = 48 + 2
x = 50
d) ( x - 32 ) : 16 = 48
x - 32 = 48 . 16
x - 32 = 768
x = 768 + 32
x = 800
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
( x - 78 ) . 2015 = 0
x - 78=0:2015
x - 78=0
x=0+78
x=78
( y - 14 ) : 2 = 3
y - 14=3.2
y - 14=6
y=6+14
y=20
y - 14 : 2 = 3
y - 7 = 3
y=3+7
y=10
124 + 118 - x = 217
118 - x = 217-124
118 - x = 93
x=118-93
x=25
x - 32 : 16 = 48
x - 2 = 48
x=48+2
x=50
124 + 336 : 4 × (32 – 16 × 2) = 124 + 84 × ( 32 – 32) = 124 + 84 × 0 = 124
a) x + 118 = 218
x = 218 – 118
x = 100
b) 18 – x = -17
X = 18 – (-17)
X = 35
c) (-18) – x = -17
X = (-18) – (-17)
X = -1
d)124 + (118 – x) = 217
118 – x = 93
X = 118 – 93
X = 25
e) (3x – 6).3 = 34
(3x – 6).3 = 81
3x – 6 = 27
3x = 33
ð X = 11
g) 23.(42 – x) = 46
42 – x = 2
ð X = 40
h) 84 – (3x + 8) = 34
3x + 8 = 84 – 34
3x + 8 = 50
3x = 50 – 8
3x = 42
X = 42 : 3
ð X = 14
i) 3.(2x + 1) – 19 = 14
3.(2x + 1) = 14 + 19
3.(2x + 1) = 33
2x + 1 = 33 : 3
2x + 1 = 11
2x = 11 – 1
2x = 10
X = 10 : 2
ð X = 5
k) 6x – 302 = 23.5
6x – 302 = 40
6x = 40 + 302
6x = 342
X = 342 : 6
ð X = 57
m) (x – 1)2 = 81
(x – 1)2 = 92
ð X – 1 = 9
ð X = 9 + 1
ð X = 10
n) 2x+1 – 5 = 27
2x+1 = 27 + 5
2x+1 = 32
2x+1 = 25
ð X = 4
Bài giải
a, \(81+243+19=\left(81+19\right)+243=100+243=343\)
b, \(2\text{ x }25\text{ x }2\text{ x }16\text{ x }4=25\text{ x }4\text{ x }2\text{ x }2\text{ x }16=25\text{ x }8\text{ x }32=200\text{ x }32=6400\)
c, \(32\text{ x }47+32\text{ x }54-32=32\text{ x }\left(47+54-1\right)=32\text{ x }100=3200\)
a,81+19+243
=100+243
b,(2x25)x2x(16x4)
=50x2x64
=100x64
=6400
c,32x47+32x54-32x1
=32x(47+54-1)
=32x100
=3200
a.x-25=0+110
x+25=110
x=85
b.118-x=142-124
118-x=18
x=100
c.3x+22=124-42
3x+22=82
3x=88-22
3x=66
x=22
d.x-2=18
x=20
e.x-32=18.16
x-32=288
x=320
f.19-2x=294:42
19-2x=7
2x=19-7
2x=12
x=6
Dung thi k cho minh nha!!!
124+(118-x)=142