Question

como fazer essa conta 2(×-1)÷3 +3(2×+1)÷9=9

Answer 1

2(x - 1)........3(2x + 1)
---------- + ------------ = 9
......3..................9

2x - 2....... 6x + 3
--------- + ----------- = 9
.....3..................9

m.c.m = 9

3(2x - 2) + 6x + 3
------------------------- = 9
...............9

6x - 6 + 6x + 3
---------------------- = 9
............9

12x - 3 = 9 ( 9 )

12x - 3 = 81

12x = 81 + 3

12x = 84

x = 84/12

x = 7