How do you solve this problem: P-15=13-6p

[latex]p-15=13-6p[/latex] [latex]-15-13=-6p-p[/latex] [latex]-28=-7p[/latex] [latex]\frac{-28}{-7}=\frac{-7p}{-7}[/latex] [latex]4=p[/latex] [latex]4-15=13-6(4)[/latex] [latex]-11=-11[/latex]

   P-15=13-6p +6p           +6p ----------------- 7p-15=13      +15  +15 ----------------- 7p=28 7      7 p = 4