Question

Tìm x:

a, 96-3.(x+1)=42

b, 12x-33=3².3³

Answer 1

Tìm x:

a, 96 - 3 . ( x + 1 ) = 42

           3 . ( x + 1 ) = 96 - 42

           3 . ( x + 1 ) = 54

             x + 1 = 54 : 3

             x + 1 = 18

                   x = 18 -1 

                   x = 17

 b, 12x - 33 = 32.33

      12x - 33 =9 . 27

      12x - 33 = 243

             12x = 243 + 33

             12x = 276

               x=276:12

               x=23

Answer 2

a, 96 - 3 . ( x + 1 ) = 42

3 . ( x + 1 ) = 96 - 42

3 . ( x + 1 ) = 54

x + 1 = 54 : 3

x + 1 = 18

x = 18 - 1

x = 17

b, 12x - 33 = 3² . 3³

12x - 33 = 9 . 27

12x - 33 = 243

12x = 243 + 33

12x = 276

x = 276 : 12

x = 23

Answer 3

a)96-3.(x+1)=42

3.(x+1) = 96 - 42

3 . (x+1) = 54

x + 1 = 54 : 3

x + 1 = 18

x = 18-1

x = 17