**Lesson Steps**:

Add 6x to 7x that will give you 13x and subtract 1 from -12 and that will give you -13. Then you divide -13 by 13 and you will get x=-1.

**Answer**:

X=-1

**Grade**: 8

**Level**: Middle school

**Subject**: Math

**Topic**: Algebra

Add 6x to 7x that will give you 13x and subtract 1 from -12 and that will give you -13. Then you divide -13 by 13 and you will get x=-1.

X=-1