Question 342253
3(2x-5)-x= -7(x+3)

6x - 15 - x = -7x - 21

5x - 15 = -7x - 21

5x + 7x = -21 + 15

12x = -6

x = -6/12

x = -1/2

To check, replace every x with -1/2 in your original linear equation.
If you get the same answer on both sides, you'll then know if x = -1/2 is correct. I'll let you do the checking.