20/450=x/400

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Solution for 20/450=x/400 equation: 


x in (-oo:+oo)

20/450 = x/400 // - x/400

20/450-(x/400) = 0

2/45-1/400*x = 0 // - 2/45

-1/400*x = -2/45 // : -1/400

x = -2/45/(-1/400)

x = 160/9

x = 160/9

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