Question

Tìm x:

a) 13 - 2 ( x + 1 ) = 7

b) 15x - 13x = 12² + 5⁶ . 6

Giúp mk với!

Answer 1

a) 13 - 2 ( x + 1 ) = 7

=> 2(x+1)=13-7

=>2(x+1)=6

=> x+1=3

=> x=2

b) 15x - 13x = 12² + 5⁶ . 6

=> 15x-13x=93864

=> x.(15-13)=93864

=> x.2=93864

=> x=46947

Answer 2

a)13-2(x+1)=7

   2(x+1)=6

   x+1=3

      x=3-1=2

b)15x-13x=12²+5⁶.6

   15x-13x=12²+9375⁰

     2x=93894

     x=469847

Answer 3

a ) 13 - 2 ( x + 1 ) = 7

2 ( x + 1 ) = 13 - 7

2 ( x + 1 ) = 6

x + 1 = 6 : 2

x + 1 = 3

x = 3 - 1

x = 2

b ) 15x - 13x = 12² + 5⁶ . 6

x ( 15 - 13 ) = 144 + 15 625 . 6

x . 2 = 144 + 93 750

x . 2 = 93 894

x = 93 984 : 2

x = 46 947

Answer 4

a) 13 - 2 ( x + 1 ) = 7

=> 2(x+1)=13-7

=>2(x+1)=6

=> x+1=3

=> x=2

b) 15x - 13x = 12² + 5⁶ . 6

=> 15x-13x=93864

=> x.(15-13)=93864

=> x.2=93864

=> x=46947