Short Answer

Algebraic Principles in Geometric Problem Solving

A technician is using the elimination method to find the measures of two angles, x and y, that are specified as complementary. The technician translates the problem into the following system of equations:

x + y = 90 x - y = 26

Identify the specific mathematical term for the relationship between the y coefficients (+1 and -1) that allows the y variable to be eliminated when these two equations are added together.

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Updated 2026-04-18

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