14x - 6x = 2³ x 5²

        8x = 8 x 25

        8x = 200

          x = 200 : 8

          x = 25

14x - 6x = 2³ . 5²

8x = 200

=> x = 200 ÷ 8

=> x = 25

Vậy x = 25

\(14x-6x=2^3.5^2\)

\(8x=200\)

\(\Rightarrow x=25\)

        Vậy x=25

14x - 6x = 2³.5²

14x - 6x = 200

( 14 - 6 )x = 200

8x = 200

=> x = 200 ÷ 8

=> x = 25

Vậy x = 25

a) 6x - 35 + 5x - 21 = (6x + 5x) - (35 + 21) = 11x - 56 = 17x - 20 => 11x = 17x - 20 + 56 = 17x + 36

=> 36 = 11x - 17x = -6x => x = 36 : (-6) = -6

b) 5x + 35 - 4x - 27 = (5x - 4x) + (35 - 27) = x + 8 = 14x + 34 => x = 14x + 34 - 8 = 14x + 26

=> 26 = x - 14x = -13x => x = 26 : (-13) = -2

(6x+5x)+(-35-21)=17x-20

11x-56=17x-20

11x-17x=-20+56

-6x=36

x=36/-6

x=-6

vậy x=-6

1) 14x-8x=10+5

x(14-8)=15

x6=15

x=15/6

2)5x-3x=30-15

2x=15

x=15/2

3)làm tương tự

1) x=2,5

2) x=7,5

3) x=4

4) x=7/3

5) x=8,25

( 6x - 8 )³ - 35 x 25 = 200

     ( 6x - 8 )³ - 35   = 200 : 25 = 8

             ( 6x - 8 )³  = 8 + 35 = 43

vì ko có số nào ^3 = 43

=> x thuộc rỗng 

`@` `\text {Ans}`

`\downarrow`

`a,`

`x - 280 \div 35 = 554`

`=> x - 8 = 554`

`=> x = 554 + 8`

`=> x = 562`

Vậy, `x = 562`

`b,`

`x + (5 \div 3) = 500`

`=> x + 5/3 = 500`

`=> x = 500 - 5/3`

`=> x = 1495/3`

Vậy, `x = 1495/3`

`c,`

`390 \div (5x - 5) = 39`

`=> 5x - 5 = 390 \div 39`

`=> 5x - 5 = 10`

`=> 5x = 10 + 5`

`=> 5x = 15`

`=> x = 15 \div 5`

`=> x = 3`

Vậy, `x = 3`

`d,`

`34x - 14x = 200`

`=> (34 - 14)x = 200`

`=> 20x = 200`

`=> x = 200 \div 20`

`=> x = 10`

Vậy, `x = 10.`

`@` `\text {Kaizuu lv uuu}`

a) \(x-280:35=554\)

\(x-8=554\)

\(x=562\)

b) \(x+\left(5:3\right)=500\)

\(x+\dfrac{5}{3}=500\)

\(x=500-\dfrac{5}{3}=\dfrac{1500}{3}-\dfrac{5}{3}=\dfrac{1495}{3}\)

c) \(390:\left(5x-5\right)=39\)

\(5x-5=\dfrac{39}{390}=\dfrac{1}{10}\)

\(5x=5+\dfrac{1}{10}\)

\(5x=\dfrac{51}{10}\)

\(x=\dfrac{51}{10}.\dfrac{1}{5}=\dfrac{51}{50}\)

d) \(34x-14x=200\)

\(20x=200\)

\(x=200:20=10\)

a) 4^2x-1 = 4³

=> 2x-1 = 3

2x = 4

x = 2

4^2x-1=64

4^2x-1=4³

2x-1=3

2x=3+1

2x=4

x=4-2

x=2