\(2125:x=100\)

\(x=2125:100\)

\(x=21,25\)

125 . x - x . 47 = 25350

x . ( 125 - 47 ) = 25350

78x = 25350

=> x = 325

x x [125 - 47] = 25350

x x 78 = 25350

x= 25350 : 78

x= 325

\(125\times x-x\times47=25350\)

\(=x\times\left(125-47\right)=25350\)

\(=x\times78=25350\)\(\Rightarrow x=25350\div78=325\)

Vậy \(x=325\)

x = 325

(125 - 47) . x = 25350

78 . x = 25350

x = 325

3978 . 1/x - 987 . 1/x = 100 

(3978 - 987) . 1/x = 100

2991 . 1/x = 100

1/x = 100/2991

x = 2991/100

#Đức Lộc#

mình cần làm gấp

A) 125 * X - X * 47 = 25350

=> X * (125 - 47) = 25350

=> X * 78 = 25350

=> X = 25350 : 78 = 325

(x-42) - 17 = 127

=> x - 42 = 127 + 17 = 144

=> x = 144 + 42 = 186

23(x+1) = 69

=> x + 1 = 69 : 23 = 3

x = 3 - 1 = 2

2x + 5 = 120 : 2 = 60

=> 2x = 60 - 5 = 55

x = 55 : 2 = 27,5

5x - 2 = 613

=> 5x = 613 + 2 = 615

x = 615 : 5 = 123

a)(x-42)-17=127

(x-42)=127+17

(x-42)=144

x=144+42

x=186

b)23(x+1)=69

(x+1)=69:23

(x+1)=3

x=3-1

x=2

c)2.x+5=120:2

2.x+5=60

2.x=60-5

2.x=55

x=55:2

x=27,5

d)5.x-2=613

5.x=613+2

5.x=615

x=615:5

x=123

(x-42)-17=127(tim x)xx

23(x+1)=69(timx)xx

2x+5=120:2(Timx)xx

5x-2=613(timx)xx

18x-18=0 

18x=0+18

18x=18

x=18:18

x=1

17(x-15)=0

(x-15)=0:17

(x-15)=0

x=15+0

x=15

x x [125 - 47] = 25350

x x 78 = 25350

x= 25350 : 78

x= 325

58 - ( x + 34 ) = 15

       x + 34    = 58 - 15 = 43

              x     = 43 - 34 = 9

18 + 24x = 50

       24x = 50 - 18 = 32

           x = 32 : 24 

          x  = 4/3

(15 + x) - 24 = 246

=> 15 + x = 246 + 24 = 270

x = 270 - 15 = 255

(298 - x) - 42 = 252

=> (298 - x) = 252 + 42 = 294

=> x = 298 - 2984 = 4

2x + 13 = 35

=> 2x = 35 - 13

2x = 22

x = 22 : 2

x  = 11