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a/b + (a+10b)/(b+10a) = 2 diubah menjadi a/b + (a/b + 10)/(1 + 10a/b) =2
misalkan a/b = x
maka x + (x + 10)/(1 + 10x) = 2 ------> (x + 10)/(1 + 10x) = 2 - x
x + 10 = 2 - 10x^2 + 19x
(5x -4) (x - 1) = 0 -----> x = 4/5 atau 1
jawabanynya a/b = 4/5 atau 0,8 (gk ada jawabannya)