dang toan tim x

Question

tim so nguyen x sao cho:

                 4 . ( x + 1 ) - 3 . ( x + 1 ) = 14

Answer 1

 4 . ( x + 1 ) - 3 .( x + 1 ) = 14

( x + 1 ). ( 4 - 3 ) = 14

(x + 1 ) . 1 = 14

x + 1          =14.1

x+1             =14

x                =14-1

x                =13

Answer 2

 4 . ( x + 1 ) - 3 . ( x + 1 ) = 14

=> 4x + 4 - 3x + 3 = 13

=>4x -3x + 4 + 3 =13

=> x + 7=13

=> x=13-7

=> x=6

Answer 3

4 . (x+1) - 3 . (x+1) = 14

4x + 4 - 3x + 3 = 14 

( 4x - 3x ) + ( 4 + 3 ) = 14

    x + 7 = 14

       x = 14 - 7

       x = 7