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Addition and Subtraction of Algebraic Expression

Evaluate: x...

Question

Evaluate:
$(x + 4 y + 7 x) - (x + 2 y)$

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Solution

$(x + 4 y + 7 x) - (x + 2 y)$

$= 8 x + 4 y - x - 2 y$

$= 7 x + 2 y$

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