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Mathematics, 21.01.2020 06:31 Teephat

Caprice adds equations a and b to solve this system of equations. what makes this
approach a valid method in general for solving a system of equations?
equation a: 8x + 3y = 27
equation b: 4x – 3y = 9
12x = 36

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Caprice adds equations a and b to solve this system of equations. what makes this
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