Two numbers multiply to be 20 and add to be 12 . What are the numbers? [numb1]

Step 1 ：Set up the equations as \(x*y=20\) and \(x+y=12\).

Step 2 ：Solve the equations by substituting \(y=20/x\) into the second equation and then solve for x.

Step 3 ：Once we have the value of x, substitute it back into the equation \(y=20/x\) to get the value of y.

Step 4 ：The solution is \(x=2\) and \(y=10\).

Step 5 ：Final Answer: The two numbers are \(\boxed{2}\) and \(\boxed{10}\).