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Addition and Subtraction of Algebraic Expression

Subtract 2a...

Question

Subtract $2 a - b$ from $3 a - b$ .

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Solution

We need to subtract $2 a - b$ from $3 a - b$
It can be written as $3 a - b - (2 a - b)$
$= 3 a - b - 2 a + b$
$= a$

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