Odpowiedź:
a)
3x + 2(3x - 2) = 14
3x + 6x - 4 = 14
9x = 14 + 4 /:9
x = 18/9 = 2
b)
x/5 - x/2 = 3
1/5x - 1/2x = 3
2/10x - 5/10x = 3
-3/10x = 3 /*(-10/3)
x = -10/3 * 3 = -10
c)
(x - 1)/x = x/(x + 2)
(x - 1)(x + 2) = x²
x² + 2x - x - 2 = x²
x² - x² + x = 2
x = 2
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Odpowiedź:
a)
3x + 2(3x - 2) = 14
3x + 6x - 4 = 14
9x = 14 + 4 /:9
x = 18/9 = 2
b)
x/5 - x/2 = 3
1/5x - 1/2x = 3
2/10x - 5/10x = 3
-3/10x = 3 /*(-10/3)
x = -10/3 * 3 = -10
c)
(x - 1)/x = x/(x + 2)
(x - 1)(x + 2) = x²
x² + 2x - x - 2 = x²
x² - x² + x = 2
x = 2
Szczegółowe wyjaśnienie:
Odpowiedź: