There are many combinations of two numbers possible that give the sum as 180. Example, 177+3 = 180,174+6 = 180,177+9 = 180,etc. You can make as many combinations because its very general term for any two number to add upto 180.
To find two numbers that add up to 180, you can use the equation x + y = 180. For example, if x is 70, then y would be 110, creating the pair (70, 110). You can choose any number for x and find y, leading to many valid pairs.
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