Question

x-15,5+8x-(13x+16.5)= 12x

Answer 1

x-15,5+8x-(13x+16,5)=12x
x-15,5+8x-13x-16,5=12x
x+8x-13x-12x=16,5+15,5
9x-25x=32
-16x=-32
x=2

Answer 2

x-15,5+8x-(13x+16,5)=12x

x-15,5+8x-13x-16,5=12x

x+8x-13x-12x=15,5+16,5

-16x=32

x=32:(-16)

x=-2