Question

Tìm x:          (5x-2⁴).7³=2.7⁴

 

Answer 1

    (5x-2⁴).7³=2.7⁴

   (5x-2⁴).7³=4802

   (5x-2⁴)= 4802:7³

   5x-2⁴   = 14

    5x       = 14+2⁴

    5x        =30

      x         =30:5

    =>  x         =6

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Answer 2

(5x-2^4).7^3=2.7^4

(5x-2^4) = 2.7^4:7^3

5x- 2^4 = 2.7

=> 5x = 14+16

=> 5x= 30

=. x= 6

Vậy x=6

Answer 3

(5X-2^4)x 7^3= 2x 7^4

(5X- 16) x 34 =4802

(5X- 16)        = 4802 : 34

(5X- 16)        = \(\frac{2401}{17}\)

5X                = \(\frac{2401}{17}\)+ 16

5X                = \(\frac{2673}{17}\)

X                 = \(\frac{2673}{85}\): 5

X                 = \(\frac{2673}{425}\)= 6

Answer 4

(5x-2^4).7^3=2.7^4

(5x-2^4) = 2.7^4:7^3

5x- 2^4 = 2.7

 5x = 14+16

5x= 30

x= 6

Vậy x =6

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