selesaikanlah : a) (2x - 5 / 2) + (5x + 2 / 6) = (2x + 3 / 4) - (x + 5 / 3) b) (2 / x+ 3) + (5 / x) = (7 / x - 2)
Matematika
fikritonggi02
Pertanyaan
selesaikanlah :
a) (2x - 5 / 2) + (5x + 2 / 6) = (2x + 3 / 4) - (x + 5 / 3)
b) (2 / x+ 3) + (5 / x) = (7 / x - 2)
a) (2x - 5 / 2) + (5x + 2 / 6) = (2x + 3 / 4) - (x + 5 / 3)
b) (2 / x+ 3) + (5 / x) = (7 / x - 2)
1 Jawaban
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1. Jawaban hoji
a)
(2x - 5 / 2) + (5x + 2 / 6) = (2x + 3 / 4) - (x + 5 / 3)
(12x - 30 / 12) + (10x + 4 / 12) = (6x + 9 / 12) - (4x + 20 / 12)
22x - 26 / 12 = 2x + 29 / 12
22x - 26 = 2x + 29
22 x - 2x = 29 - 26
20x = 3
x = 3/20
b)
(2 / x+ 3) + (5 / x) = (7 / x - 2)
2x + 5x + 15 / x^2 + 3x = 7 / x - 2
7x +15 / x^2 + 3x = 7 / x - 2
7x^2 + x - 30 = 7x^2 + 21x
20x = -30
x = -3/2