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IF 999x + 888y = 1332 and 888x + 999y = 555, then the value of x + y is?

1888
21
3555
4999

Answer:- 1

Explanation:-

Solution:

\begin{aligned} 999 x + 888 y = 1332 \\ \underline{888 x + 999 y = 555} \\ 1887 (x + y) = 1887 \\ \Rightarrow x + y = \frac{1887}{1887} \\ \Rightarrow x + y = 1 \end{aligned}

$\eqalign{ & 999x + 888y = 1332 \cr & \underline {888x + 999y = 555} \cr & 1887\left( {x + y} \right) = 1887 \cr & \Rightarrow x + y = \frac{{1887}}{{1887}} \cr & \Rightarrow x + y = 1 \cr}$

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", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} 999 x + 888 y = 1332 \\ \underline{888 x + 999 y = 555} \\ 1887 (x + y) = 1887 \\ \Rightarrow x + y = \frac{1887}{1887} \\ \Rightarrow x + y = 1 \end{aligned}

$\eqalign{ & 999x + 888y = 1332 \cr & \underline {888x + 999y = 555} \cr & 1887\left( {x + y} \right) = 1887 \cr & \Rightarrow x + y = \frac{{1887}}{{1887}} \cr & \Rightarrow x + y = 1 \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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