Breann solved the system of equations below. what mistake did she make in her work?
2x + y =...
Mathematics, 29.08.2019 08:50 vitothebest1
Breann solved the system of equations below. what mistake did she make in her work?
2x + y = 5
x β 2y = 10
y = 5 β 2x
x β 2(5 β 2x) = 10
x β 10 + 4x = 10
5x β 10 = 10
5x = 20
x = 4
2(4) + y = 5
y = β3
she should have substituted 5 + 2x
she combined like terms incorrectly, it should have been 4x instead of 5x
she subtracted 10 from both sides instead of adding 10 to both sides
she made no mistake
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