Question

$if (999x + 888y = 1332) (888x + 999y = 555 )then the value of x + y is (1).888 (2).1.(3)999.(4).555$
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Answer 1

9x + 8y =12

8x + 9y =5

solve and find x and 6

Answer 2

add both equations

1887x+1887y=1887÷1887

x+y=1

therefore we have found that the value of x+y = 1
it is a very simple method to find
so the answer is option 2

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