Tìm x :

[ 500 : (x - 10) x 2 ] + 100 = 200

=>       500 : ( x - 10 ) x 2 = 200 - 100

=>       500 : ( x - 10 ) x 2 = 100

=>             500 : ( x - 10 ) = 100 : 2

=>             500 : ( x - 10 ) = 50

=>                         x - 10 = 500 : 50

=>                         x - 10 = 10

=>                                x = 10 + 10

=>                                x = 20

                                  Vậy x= 20 

[500 : (x-10) x 2] + 100 = 200

500 : (x-10) x 2 = 100

=> 500 : (x-10) = 50

=> x - 10 = 10

=> x =20

x+100=200-500                                    x+800=1000

x+100=-300                                         x        =1000-800

x       =(-300)-100                                 x        =200

x       =(-300)+(-100)

x       =-400

x+100=200-500

x+100=-300

x=-300+100

x=-200

x+800=1000

x=1000-800

x=200

x+100=200-500

x+100=-300

x=-300-100

x=-400

a)1700

b)2000

a, 500+500+500+(100 x 2)

=500 x 3+ 100x2

=1500+200

=1700

b, 700+300+(100 x 10)=700+300+1000=1000+1000=2000

k minh nha

a) = 1700

b) =2000

1200000000000

\(\frac{125}{x}+\frac{375}{x}-\frac{200}{x}=500\)

\(\Leftrightarrow\)\(\frac{125+375-200}{x}=500\)

\(\Leftrightarrow\)\(\frac{300}{x}=500\)

\(\Leftrightarrow500x=300\)

\(\Leftrightarrow x=\frac{3}{5}\)

\(\frac{125}{x}+\frac{375}{x}-\frac{200}{x}=500\)

\(\Leftrightarrow\frac{125+375-200}{x}=\frac{500x}{x}\) 

\(\Leftrightarrow300=500x\)

\(\Leftrightarrow x=\frac{3}{5}\)

x= 3/5 banj nhe

b) 200 x 4 = .800.....              300 x 2 = ..600....

200 x 2 = .400.....             300 x 3 = ...900...

400 x 2 = ...800...             500 x 1 = ..500....

100 x 4 = ..400....             100 x 3 = .300.....

800

400

800

400

600

900

500

300

ai giúp mình với

500 + x = 100 + 500

500 + x = 600

          x = 600 - 500

          x = 1001

300 - x = 300 + 200

300 - x = 500

         x = 300 - 500

         x = -200

400 - x = 200 + 400

400 - x = 600

         x = 400 - 600

         x = -200

k mk nha mk k l

ại ^_^

500 + 100 = 100 + 500

300 + 200 =  300 + 200

400 + 200  = 200 + 400

500+x=100+500

vay x =100

300-x=300+200

vay x= - 200

400-x=200+400

vay x= -200

x+100-200=1010

x+100=1010+200

x+100=1210

x=1210-100

x=1110

X + 100 - 200 = 500 x 2 + 10

X + 100 - 200 = 1010

X + 100         =1010 + 200

X + 100         = 1210

X                  =  1210-100

X                  =  1110

ai mik mik lại

các bạn nhớ nhé

\(X+100-200=500\times2+10\)\(0\)

\(X+100-200=1000+10\)

\(X+100-200=1010\)

\(X+100\)          \(=1010+200\)

\(X+100\)          \(=1210\)

\(X\)                        \(=1210-100\)

\(X\)                         \(=1110\)