Fill in the blanks:
v). $7 - 4 =$ and 7ab - 4ab =

3ab

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Solution

Step : Find the values
Subtract 4 from 7
$\Rightarrow 7 - 4 = 3$
Subtract $4 a b$ from $7 a b$
$\Rightarrow 7 a b - 4 a b = (7 - 4) a b (taking a b common)$
$= 3 a b$

Hence, the values are $3$ and $3 a b$ respectively.

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