Mathematics, 21.12.2020 20:00 Elllv

Ella simplifies (3 b + 4 r) + (negative 2 b minus r) and says the result is b Plus 5r. What error did Ella make?

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Ella simplifies (3 b + 4 r) + (negative 2 b minus r) and says the result is b Plus 5r. What error di...

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