Breann solved the system of equations below. what mistake did she make in her work?
2x...
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Mathematics, 18.11.2019 16:31 jeftegerman988
Breann solved the system of equations below. what mistake did she make in her work?
2x + y = 5
x − 2y = 10
y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
5x = 20
x = 4
2(4) + y = 5
y = −3
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