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OpenStudy (anonymous):
Simplify the expression: 9 x + 4 y minus 7 x + 2 y. A. 2x2 + 6y2 B. 2x + 6y C. 8xy D. 8x2y2
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OpenStudy (helder_edwin):
just substract like terms. for instance \[\large 9\color{red}{x}-7\color{red}{x}=(9-7)\color{red}{x}=2\color{red}{x} \]
OpenStudy (anonymous):
The answer is B.)
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