The basic idea here is to look at both equations and solve for either x or y in one of the equations. Then plug the known value into the second equation and solve for the other variable.
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To find two numbers that add to 3 and multiply to 18, we can set up a system of equations. Let's call the two numbers x and y. We have the equations x + y = 3 and x * y = 18. By solving this system, we can find that the numbers are 1.5 and 12.
To find two numbers that add to 20 and multiply to 29, we can set up a system of equations. Let's call the two numbers x and y. We have the following equations: x + y = 20 and x * y = 29. By solving these equations simultaneously, we find that the two numbers are 5 and 15.
To find the two numbers that have a difference of 9 and a quotient of 2, we can set up a system of equations. Let's call the larger number x and the smaller number y. We have the equations x - y = 9 and x / y = 2. By solving these equations simultaneously, we can find that the larger number is 6 and the smaller number is 3.
x=3
x = y = 3