Bài 1 :

a , x = 675

b , x = 1764

c , x = 0

Bài 2 :

a , x = 3 , 2 , 1 , 0

b , x = 6 , 5 , 4 , 3 , 2 , 1 , 0

c , x = 3 , 4

Bài 1:Tìm x

a, x:5=27\(x\)5

    x:5=135

    x  =135\(x\)5

    x  =675

b, x:7=36\(x\)7

    x:7=252

    x  =252\(x\)7

    x  =1764

c,x\(x\)132=312 x (5-3-2)

  x\(x\)132=312x0

x\(x\)132=0

x          =0:132

x          =0

a)x+10=30

=>x=20

b)x+10-5=20+20

x+10-5=40

x+10=45

=>x=35

x + 10 = 50 - 20

x + 10 = 30

x = 20 

x + 10 - 5 = 20 + 20

x + 5 = 40

x = 35 

x-5=0

x=0+5

x=5

x*7=14

x=14:7

x=2

x+2=6

x=6-2

x=4                            

a) x - 5 = 0

=> x     = 0 + 5

=> x      = 5

b) x . 7 = 14 

=> x     = 14 : 7

=> x      = 2

c) x + 2 = 6

=> x      = 6-2

=> x       = 4

Ai k mik mik k lại

a) x.4/5:2=6/7                                                              

    x.4/5=6/7*2

    x.4/5=12/7

    x=12/7:4/5

    x=15/7

b) 6/5:x:5/4=10/15

    6/5:x=10/15*5/4

    6/5:x=5/6

    x=6/5:5/6

    x=36/25

x - 199 = 3 . 300 : 5

=> x - 199 = 180

=> x = 180 + 199

=> x = 379

x−199=3x300:5

\(\Rightarrow x=900:5+199\)

\(\Rightarrow x=450+199\)

\(\Rightarrow x=649\)

Hok tốt!

_Lan Lan_

\(\frac{-33}{25}\)

\(x+\frac{8}{5}=\frac{7}{25}\)

\(x=\frac{7}{25}-\frac{8}{5}\)

\(x=\frac{-33}{25}\)

\(6157:X=5\left(dư2\right)\)

\(X=6157x5+2\)

\(X=30785+2\)

\(X=30787\)

_HT_

6157:x=5(dư 2)

(6157-2):x=5

6155:x=5

x=6155:5

x=1231

HT

\(\overline{3x}+\overline{x3}=11\times11\)

\(\overline{3x}+\overline{x3}=121\)

\(33+\overline{xx}=121\)

\(\overline{xx}=121-33\)

\(\overline{xx}=88\)

Vậy chữ số x cần tìm là 8.

X = 8

B1

a) 17 b) 6 c) 112 d)9687

B2

100-x=33

x=100-33

x= 67

Ko bít

22222222222222222

Cgcr

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