Answer: Let’s say the two angles are x and y. If the two angles add up to 180 degrees and their difference is 90 degrees, then we can write the following system of equations:
x + y = 180
x - y = 90
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Adding the two equations, we get 2x = 270, so x = 135. Substituting this value into the first equation, we get 135 + y = 180, so y = 45.
Therefore, one angle is 135 degrees and the other angle is 45 degrees.
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