21600

21600

26100 nha bn

174-x=100

      x=174-100

      x=74.

174-x=100

      x=174-100

      x=74

174-x=100

        x =174-100 

        x =74

k mình nha!Chúc bạn học tốt!

X - 637 = 125 x 6
X= X - 637 = 750
X= 750 + 637 
X= 1387

X + 174  = 3168 : 9
X= X + 174 = 352
X= 352 - 174 
X = 178

       x - 637 = 750

       x    = 750 + 637

       x    =  1387

x + 174 = 352

       x     = 352 - 174

       x     = 178

X - 637 = 125 x 6

X - 637 =      750

X          =750 + 637

X          =      1387

X + 174  = 3168 : 9

X + 174  =    352

X            = 352 - 174

X            =  178

Chọn B

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

\(120+\left(50+x\right)=180\)

\(\Rightarrow50+x=180-120\)

\(\Rightarrow50+x=60\)

\(\Rightarrow x=60-50=10\)

Vậy x = 10

\(140+\left(20-x\right)=150\)

\(\Rightarrow20-x=150-140\)

\(\Rightarrow20-x=10\)

\(\Rightarrow x=20-10=10\)

Vậy x =x10

\(100-\left(25+x\right)=40\)

\(\Rightarrow25+x=100-40\)

\(\Rightarrow25+x=60\)

\(\Rightarrow x=60-25=35\)

Vậy x = 35

\(130-\left(100+x\right)=25\)

\(\Rightarrow100+x=130-25\)

\(\Rightarrow100+x=105\)

\(\Rightarrow x=105-100=5\)

Vậy x = 5

\(174-\left(143+x\right)=22\)

\(\Rightarrow143+x=174-22\)

\(\Rightarrow143+x=152\)

\(\Rightarrow x=152-143=9\)

Vậy x = 9

x=174:142

x=..

=>x=174:142

   \(x=\dfrac{174}{142}=\dfrac{87}{71}\)

x=87/71

a, 512*(2-128)-128*(-512)

   = 512*2 - 512*128 -128*(-512)

   =512*2-512*128-(-128)*512

   = 512*(2-128+128)

   = 512*2

   =1024

   b, 2155-(174+2155)+(-68+174)

     =2155-174-2155+(-68)+174

     = (2155-2155)+[(-174)+174]+(-68)

     =0+0+(-68)

      =-68

    c,-78+11*(97-99)

       =-78+11*(-2)

        =-78+(-22)

       =-100

    d, |+426|+|-345|+|+456|+|-789|

      = 426+345+456+789

      =(426+345)+(456+789)

      =771+1245

      =2016

\(\text{x-(+85)=-174}\)

\(x-85=-174\)

\(x=-174+85=-89\)

K mình nhé bạn

\(x-\left(+85\right)=-174\)

\(\Rightarrow x=-174+85\)

\(\Rightarrow x=-89\)

x - (+85)= -174

x= - ( 174 + 85)

x=  - 259