a, X x 186-Z x 86=3400

  X x (186-86) =3400

X x 100=3400

X= 3400: 100

X= 34

b, X x 75+57 x X =32604

X x (75+57)=32604

X x 132=32604

X= 32604 : 132

X = 247

c, 216: X +34: X =10

(216+34) : X=10

250 : X =10

X= 250:10

X= 25

d, 2125:X -125 :X=100

(2125-125) :X= 100

2000: X=100

X= 2000:100

X= 20

a) \(x\times186-x\times86=3400\)

       \(x\times\left(186-86\right)=3400\)

                        \(x\times100=3400\)

                                      \(x=3400:100\)

                                       \(x=34\)

b) \(x\times75+57\times x=32604\)

       \(x\times\left(75+57\right)=32604\)

                     \(x\times132=32604\)

                                   \(x=32604:132\)

                                   \(x=247\)

c) 216 : x + 34 : x = 10

       (216 + 34) : x = 10

                  250 : x = 10

                           x = 250 : 10

                           x = 25

d) 2125 : x - 125 : x = 100

       (2125 - 125) : x = 100

                 2000 : x = 100

                           x = 2000 : 100

                           x = 20

a, X x (186 - 86 ) =3400

X x100 =3400

X =3400 : 100

X = 34

Hô nhiều nhưng cố lên các bn ơi các bn sẽ làm được mà

Bạn ghi rõ dấu nhân với x ra , mk chẳng phân biệt đc

(X:10)+37=60<=>X:10=23=>X=230

25xX-15xX=72<=>10xX=72=>X=7,2

138-(Xx5)=38<=>Xx5=100=>X=20

(Xx9):52=18<=>Xx9:52=18=>x:52=2=>x=104

52xX+48xX=100=>100xX=100=>X=1

623xX-123xX=1000=>500xX=100=>X=2

Xx16+84xX=700=>100xX=700=>X=7

236xX-Xx36=2000=>200xX=2000=>X=10

216:X+34:X=10=>250:X=10=>X=25

2125:X-125:X=100=>2000:X=100=>X=20

a (X:10)+37=60

X:10=23

X=2,3

b 25xX-15xX=72

X(x25-15)=72

Xx10=72

X=7,2

c 138-(Xx5)=38

Xx5=100

X=20

d (Xx9):52=18

Xx9=936

X=104

e 52xX+48xX=100

Xx(52+48)=100

Xx100=100

X=1

f 623xX-123xX=1000

Xx(623-123)=1000

Xx500=1000

X=2

g Xx16+84xX=700

Xx(16+84)=700

Xx100=700

X=7

h 236xX-Xx36=2000

Xx(236-26)=2000

Xx200=2000

X=10

i 216:X+34:X=10

(216+34):X=10

250:X=10

X=25

f 2125:X-125:X=100

(2125-125):X=100

2000:X=100

X=20

34 x 1 125 -25 x 34- 34 x 100

= 38 250 - 850 - 34 000

= 37 400 - 34 000

= 3 000

~HT~

a/ 34

b/ 247

c/ 25

d/ 20

T.I.C.K cho mình nha

Chúc bạn hok tốt

a)X x 62 + X x 38 = 4200                        b) X x 186 - X x 86 = 3400

   X x 62 + 38 =4200                                    X x 186 - 86 = 3400

   X x 100 = 4200                                         X x 100 = 3400

   X           = 4200 : 100                                X           = 3400 : 100

   X           = 42                                             X           = 34

                         c)X x 623 - X x 123 = 1000

                            X x 623 - 123 = 1000

                            X x 500 = 1000

                            X           = 1000 : 500

                            X           = 2