a) 219-7(x+1)=100

7(x+1)= 219-100

7(x+1) =119

x+1 = 119:7

x+1 = 17

=>x = 16.

b)(3x-6).3 = 24

3x-6 = 24:3

3x - 6 = 8

3x = 8+6

3x = 14

=> X không thỏa mãn vì x này là số thập phân

a)219-7(x+1)=100

212(x+1)=100

x+1=212:100

x+1=2,12

x=2,12-1

x=1,12

1.12 nha bạn

Nhớ k cho mình nha

Chúc các bạn học giỏi

a)                                                                   

219-7(x+1)=100                                           

=>7(x+1)=219-100                                   

=>7(x+1)=119

=>x+1=119:7

=>x+1=17

=>x=16

A) 7(X+1)=219-100

  7(x+1)=119

x+1=17

x=17+1

x=18

b)3x.6=54:3

3x.6=18

3x=18:6

3x=3

x=3:3

x=1

xin loi to nham = 16

a. 219-7(x+1)=100

=> 7(x+1)=219-100

=> 7(x+1)=119

=> x+1=119:7

=> x+1=17

=> x=17-1

=> x=16

b. (3x-6).3=3⁴

=> 3x-6=3⁴:3

=> 3x-6=3³

=> 3x-6=27

=> 3x=27+6

=> 3x=33

=> x=33:3

=> x=11

a. 219-7(x+1)=100

=> 7(x+1)=219-100

=> 7(x+1)=119

=> x+1=119:7

=> x+1=17

=> x=17-1

=> x=16

b. (3x-6).3=3⁴

=> 3x-6=3⁴:3

=> 3x-6=3³

=> 3x-6=27

=> 3x=27+6

=> 3x=33

=> x=33:3

=> x=11

Bạn Ruxian trả lời đúng

a) 

<=> 219 - 7x - 7 = 100

<=>         -7x       = 100 - 219 + 7

<=>          -7x      = -112

<=>             x       = -112 : (-7)

<=>             x       = 16

b)

<=> 9x - 18 = 34

<=> 9x         = 34 + 18

<=> 9x         = 52

<=>   x         = 52 : 9

<=>   x         = 52/9

a)219-7(x+1)=100

         7(x+1)=219-100

         7(x+1)=119

            x+1 =119:7

            x+1 =17

            x     =17-1

            x     =16

b)  (3x-6).3=34

    3x-6      =34:3

    3x-6      =\(\frac{34}{3}\)

    3x         =\(\frac{34}{3}\)- 6

    3x         =\(\frac{16}{3}\)

      x         =\(\frac{16}{3}\): 3

      x         =\(\frac{16}{9}\)

ko bit ai         dung

a)219-7(x+1)=100

7(x+1)=219-100

x+1=119/7

x+1=17

x=17-1

x=16

b)(3x-6)*3=64

3x-6=64/3

3x=64/3+6

3x=82/3

x=82/3:3

x=82/9

a) 219-7(x+1)=100

219-7x-7=100

-7x=100-219+7

-7x=-112

x=16

b) (3x-6).3=64

3x-6=64/3

3x=82/3

x=82/9

a)219-7(x+1)=100

7(x+1)=219-100

7(x+1)=119

x+1=119:7

x+1=17

x=17-1

x=16

b)(3x-6).3=3⁴

(3x-6).3=81

3x-6=81:3

3x-6=17

3x=27+6

3x=33

x=33:3

x=11

li-ke cho mình nha Duong Thi Hoai My

(3x-6).3= 3 mũ 4

nếu gì nguyện cau chúc củat bai t0an va thay s0 thi  sa0

a)

\(219-7\left(x+1\right)=100\)

\(\Rightarrow7\left(x+1\right)=119\)

\(\Rightarrow x+1=17\)

=> x = 16

Vậy x = 16

b)

\(\left(3x-6\right)3=3^4\)

\(\Rightarrow\left(x-2\right)3^2=3^4\)

=> x - 2 = 9

=> x = 7

Vậy x = 7

Giải:

a, 219 - 7(x + 1) = 100

7(x + 1) = 219 - 100

7(x + 1) = 119

x + 1 = 119 : 7

x + 1 = 17

x = 17 - 1

x = 16

b, (3x - 6) . 3 = 3⁴

(3x - 6) . 3 = 81

3x - 6 = 81 : 3

3x - 6 = 27

3x = 27 + 6

3x = 33

x = 33 : 3

x = 11

a. 219 - 7(x+1) = 100

    7(x+1)=119

     x+1=119:7

    x+1=17

    x=16

Vậy x=16

b. (3x - 6) . 3 = 3⁴

     3x-6=3⁴:3

     3x-6=3³

     3x=33

    x=11

Vậy x=11  

a) \(219-7\left(x+1\right)=100\)

\(\Leftrightarrow219-7x-7=100\)

\(\Leftrightarrow-7x=100-219+7=-112\)

\(\Leftrightarrow x=16\)

b) \(\left(3x-6\right)\cdot3=3^4\)

\(\Leftrightarrow\left(x-2\right)\cdot3^2=3^4\)

\(\Leftrightarrow x-2=3^2\)

\(\Leftrightarrow x=9+2=11\)

a) \(219-7\left(x+1\right)=100\)

\(\Rightarrow7\left(x+1\right)=119\)

\(\Rightarrow x+1=119:7\)

\(\Rightarrow x+1=17\)

\(\Rightarrow x=16\)

b) \(\left(3x-6\right)3=3^4\)

\(\Rightarrow\left(3x-6\right)=3^3:3\)

\(\Rightarrow\left(3x-6\right)=3^3\)

\(\Rightarrow\left(3x-6\right)=27\)

\(\Rightarrow3x=27-6\)

\(\Rightarrow3x=21\)

\(x=21:3\)

\(\Rightarrow x=7\)