Question

Câu 16. (TH) (1,0 điểm) Tìm $x$, biết:

a) $25 + x = 11$.

b) $3x = 3^5$.

Answer 1

a) \(25+x=11\)

\(x=11-25\)

\(x=-14\)

b) \(3x=3^5\Rightarrow x=3^5:3\Rightarrow x=3^4=81\)

Answer 2

a) $+$

Answer 3

a) $25+x=11$

         x = 11 - 25

         x = - 14

b) $3$x = 3⁵

   x = 3⁵ : 3

  x  = 3⁴ = 81

 

 

 

Answer 4

25 + (-14) = 11

3 5 = 35

Answer 5

25 + x = 11

x = 25 - 11                                                                                                                                                                 

x = 14

vậy x = 14 

 

b, 3x = 3⁵

^{3x = 243}

^{x = 243 : 3}

^{x = 81}

^{vậy x = 81}

Answer 6

a) x = - 14

b) x = 81

Answer 7

-14TFFXSGHVAHGSGÁHSHSÂPZSJ BIDKÁÍAKJWYEWSƯQD

Answer 8

a) 14

b) 81

Answer 9

a) 14

b) 81

Answer 10

a) 14

b) 81

Answer 11

a) 14

b) 81

Answer 12

a) 14

b) 81

Answer 13

a) $25+x=11$ suy ra

$x=11-25$

$x=-14$.

b) 3�=353x=35 suy ra

�=35:3x=35:3

�=34=81x=34=81.

Answer 14

a)x=14.        b)x=81

Answer 15

a)x=14.        b)x=81

Answer 16

a)25+x=11

x = 11-25

b) 3x = 3^5

x = 3^5 : 3

x =3^4 = 81

x = -14

Answer 17

a)25+x=11

x = 11-25

b) 3x = 3^5

x = 3^5 : 3

x =3^4 = 81

x = -14

Answer 18

a,\(x=11-25\)

\(x=-14\)

b,\(x=3^5:3\)

\(x=3^4\)