Seudónimo
Seudónimo
29-01-2018
Mathematics
contestada
please help thanks very much
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choixongdong
choixongdong
29-01-2018
x/(x+2) = (x+2)/(x+5)
(x+2)^2 = x(x+5)
x^2 + 4x + 4 = x^2 + 5x
x = 4
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