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Pigeon(hole) orz

Source: 2022 AMC 8 #20

January 25, 2022
2022 AMC 8

Problem Statement

The grid below is to be filled with integers in such a way that the sum of the numbers in each row and the sum of the numbers in each column are the same. Four numbers are missing. The number xx in the lower left corner is larger than the other three missing numbers. What is the smallest possible value of xx? [asy] unitsize(0.5cm); draw((3,3)--(-3,3)); draw((3,1)--(-3,1)); draw((3,-3)--(-3,-3)); draw((3,-1)--(-3,-1)); draw((3,3)--(3,-3)); draw((1,3)--(1,-3)); draw((-3,3)--(-3,-3)); draw((-1,3)--(-1,-3)); label((-2,2),"2-2"); label((0,2),"99"); label((2,2),"55"); label((2,0),"1-1"); label((2,-2),"88"); label((-2,-2),"xx"); [/asy] <spanclass=latexbold>(A)</span>1<spanclass=latexbold>(B)</span>5<spanclass=latexbold>(C)</span>6<spanclass=latexbold>(D)</span>8<spanclass=latexbold>(E)</span>9<span class='latex-bold'>(A) </span> -1 \qquad <span class='latex-bold'>(B) </span> 5 \qquad <span class='latex-bold'>(C) </span> 6 \qquad <span class='latex-bold'>(D) </span> 8 \qquad <span class='latex-bold'>(E) </span> 9 \qquad