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
+4
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Home » Mathematics » 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