First of all, find out what x is when 7x - 5 = 12 {from Column A}

7x - 5 = 12

7x = 17 {added 5 to both sides}

x = 17/7 {divided both sides by 7}

x = 2 3/7 {changed to mixed number}

Column A is 2 3/7

Column B is 3

7x - 5 = 12

7x = 17 {added 5 to both sides}

x = 17/7 {divided both sides by 7}

x = 2 3/7 {changed to mixed number}

Column A is 2 3/7

Column B is 3

**B.) The number in column B is greater.***- Algebra House*