Question

Equação
4+5=-12×-5×

Answer 1

4 + 5 = - 12x - 5x
9 = - 17x ( - 1)
- 9 = 17x
17x = - 9
 x = - 9 
       17

Answer 2

4 + 5 = - 12x - 5x

9 = - 17x

17x = - 9

x= - 9/17