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x≠16 i x≠58
(11-x)(58-x)=(38-x)(16-x)
11*58+11*(-x)-x*58-x*(-x)=38*16-38*x-x*16-x*(-x)
638-11x-58x+x²=608-38x-16x+x²
638-69x=608-54x
638-608=-54x+69x
15x=30 /:15
x=2
9/14=36/56