Jacob bought $x$ shirt for $1$ shirt at 35 $, t h a t i s o n s a l e f o r$ 40\% $o f f a n d a l s o b o u g h t t w o r e d b o w t i e t h a t c o s t s f o r$ 1 $t i e i s$ $21$ . What is the total cost in terms of $x$ ?

C = 14 x + 42

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C = 21 x + 21

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C = 21 x + 42

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C = 35 x + 42

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Solution

The correct option is D $C = 21 x + 42$
The cost of $1$ shirt is 35$.
Since the discount given is $40 %$ , the selling price becomes $35 - 40 %$ of $35 = 60 %$ of $35 = 21$
Thus, the selling price of $x$ shirts would be $21 x$ .
Since one tie costs rupees $21$ , two ties would cost Rs. $42$
Thus, the total cost could be written as $C = 21 x + 42$

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