PLZ HELP!!!! Solve 7/2 x + 1/2 x = 3x +15/2 + 5/2 x?

7/2 x + 1/2 x = 3x +15/2 + 5/2 x
(7x+x-6x-5x)/2=15/2
-3x= 15
x= -5

(7/2)x + (1/2)x = 3x + 15/2 + (5/2)x
7x/2 + x/2 = 3x + 15/2 + 5x/2
2(7x/2 + x/2) = 2(3x + 15/2 + 5x/2)
7x + x = 6x + 15 + 5x
8x - 6x - 5x = 15
-3x = 15
x = 15/-3
x = -5

Assume question is :-

(7/2) x + (1/2) x = 3x + 15/2 + (5/2) x
7x + x = 6x + 15 + 5x
8x = 11x + 15
- 15 = 3 x
x = - 5

7/2x +1/2x = 3x+15/2+5/2x
x(7/2+1/2) - x(3+5/2)=15/2
x(4)-x(11/2)=15/2
x(4-11/2)=15/2
x(-3/2)=15/2
x=(15/2) / (-3/2)
x= -5