Respuesta :
6-x-x=18
-x-x=18-6
-x-x=12
-2x=12
x=12/-2
x=-6
Check: 6- (-6)- (-6) remember - - = +
So basically it's 6+6+6=18
-x-x=18-6
-x-x=12
-2x=12
x=12/-2
x=-6
Check: 6- (-6)- (-6) remember - - = +
So basically it's 6+6+6=18