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Question

A part of monthly expenses of a family on milk is fixed which is Rs. $$700$$ and remaining varies with quantity of milk taken extra at the rate of Rs. $$25$$ per litre. Taking quantity of milk required extra as $$x$$ litre and total expenditure on milk Rs. $$y$$ , write a linear equation representing above information.


Solution


Extra milk required = $$x$$ litre
total expenditure = Rs $$y$$

cost of extra milk = Rs. $$25$$/litre
extra expense $$= 25\times x =$$ Rs. $$25x$$
fixed expense = Rs. $$700$$

Total expense = fixed expense + extra expense
$$\Rightarrow y = 700+25x$$

Maths

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