The difference between a number and 12 is 20
The difference between two numbers is 12.The two numbers are: x and (x+12)If 20 is added to twice the larger number the result is 4 more than 3 times the smaller number.2(x+12) + 20 = 3x + 42x + 24 + 20 = 3x + 42x + 44 = 3x + 42x - 3x = 4 - 44