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Kelas 7 MatematikaBab Aljabar
3/(x - 4) - x/(x² - 3x - 4)
= (3(x + 1)/((x - 4) (x + 1))) - x/((x - 4) (x + 1))
= (3x + 3 - x)/((x - 4) (x + 1))
= (2x + 3)/((x - 4) (x + 1))