Solve for P in the scientific formula PV = nRT

Describe how making an ‘and’ compound sentence effects your solution set

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i