130-(100-x)=25
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![](https://rs.olm.vn/images/avt/0.png?1311)
a)50 + x = 180 - 120
50 + x = 60
x = 60-50
x = 10
b)20-x = 150-140
20-x = 10
x = 20-10
x = 10
c) 25+x = 100-40
25+x=60
x= 60-25
x=35
d) 100+x =130-25
100+x = 105
x = 105-100
x = 5
e) 143+x = 174-22
143+x = 152
x = 152-143
x = 9
ỦNG HỘ MK NHÁ
120 + ( 50 + x ) = 180
50 + x = 180 - 120
50 + x = 60
x = 60 - 50
x = 10
140 + ( 20 - x ) = 150
20 - x = 150 - 140
20 - x = 10
x = 20 - 10
x = 10
100 - ( 25 + x ) = 40
25 + x = 100 - 40
25 + x = 60
x = 60 - 25
x = 35
130 - ( 100 + x ) = 25
100 + x = 130 - 25
100 + x = 105
x = 105 - 100
x = 5
174 - ( 143 + x ) = 22
143 + x = 174 - 22
143 + x = 152
x = 152 - 143
x = 9
k mk nha
Thanks nhìu
![](https://rs.olm.vn/images/avt/0.png?1311)
\(130-\left(100+x\right)=25\)
\(100+x=130-25\)
\(100+x=105\)
\(x=105-100\)
\(x=5\)
Vậy \(x=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{x-130}{20}\)+\(\dfrac{x-100}{25}\)+\(\dfrac{x-60}{30}\)+\(\dfrac{x-10}{35}\)=10
⇔\(\dfrac{2625\left(x-130\right)}{52500}\)+\(\dfrac{2100\left(x-100\right)}{52500}\)+\(\dfrac{1750\left(x-60\right)}{52500}\)+\(\dfrac{1500\left(x-10\right)}{52500}\)=\(\dfrac{525000}{52500}\)
⇔2625\(x\)-341250+2100\(x\)-210000+1750\(x\)-105000+1500\(x\)-15000=525000
⇔ 7975\(x\) = 1196250
⇔ \(x\) = \(\dfrac{1196250}{7975}\)
⇔\(x \) = 150
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 120 + ( 50 + x ) = 180
50 + x = 180 - 120
50 + x = 60
x = 60 - 50
x = 10
b) 130 - ( 100 + x )= 25
100 + x = 130 - 25
100 + x = 105
x = 105 - 100
x = 5
a) 50 + x = 180 - 120
50 + x = 60
x = 60 - 50
x = 10
b)100 + x = 130 - 25
100 + x = 105
x = 105 - 100
x = 5.
![](https://rs.olm.vn/images/avt/0.png?1311)
\(100+x=130-25\)
\(100+x=105\)
\(x=105-100\)
\(x=5\)
k cho mik nha bn
HT
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(70-\left(x-3\right)=45\)
\(x-3=70-45\)
\(x-3=25\)
\(x=25+3\)
\(x=28\)
b) \(12+\left(5+x\right)=20\)
\(5+x=20-12\)
\(5+x=8\)
\(x=8-5\)
\(x=3\)
c) \(130-\left(100+x\right)=25\)
\(100+x=130-25\)
\(100+x=105\)
\(x=105-100\)
\(x=5\)
d) \(175+\left(30-x\right)=200\)
\(30-x=200-175\)
\(30-x=25\)
\(x=30-25\)
\(x=5\)
e) \(\left(x+12\right)+22=92\)
\(x+12=92-22\)
\(x+12=70\)
\(x=70-12\)
\(x=58\)
f) \(95-\left(x+2\right)=45\)
\(x+2=95-45\)
\(x+2=50\)
\(x=50-2\)
\(x=48\)
a)
70 - (x - 3) = 45
x - 3 = 70 - 45 = 25
x = 25 + 3 = 28
Vậy x = 28
b)
12 + (5 + x) = 20
5 + x = 20 - 12 = 8
x = 8 - 5 = 3
Vậy x = 3
c)
130 - (100 + x) = 25
100 + x = 130 - 25 = 115
x = 115 - 100 = 15
Vậy x = 15
d)
175 + (30 - x) = 200
30 - x = 200 - 175 = 25
x = 30 - 25 = 5
Vậy x = 5
e)
(x + 12) + 22 = 92
x + 12 = 92 - 22 = 70
x = 70 - 12 = 58
Vậy x = 58
f)
95 - (x + 2) = 45
x + 2 = 95 - 45 = 50
x = 50 - 2 = 48
Vậy x = 48
![](https://rs.olm.vn/images/avt/0.png?1311)
a,70-5(x-3)=45
5(x-3) = 70 - 45
5(x-3) = 25
x-3 = 25 : 5
x - 3 = 5
x = 5 + 3
x = 8.
b,12+(5+x)=20
(5+x) = 20 - 12
(5+x) = 8
x = 8 - 5
x = 3
c,130-(100 + x)=25
100 + x = 130 - 25
100 + x = 105
x = 105 - 100
x = 5
Hok tốt !
a,70-5(x-3)=45
5(x-3) =70-45
5(x-3) =25
(x-3) =25:5
x-3 =5
x=5+3
x=8
Số 5 nha bạn hiền
130-(100-x)=25
100-x=130-25
100-x=105
x=100-105
x=-5