Respuesta:
Explicación paso a paso:
1) (3 - x)/(x + 1) = 2/1
1(3 - x) = 2(x + 1)
3 - x = 2x + 2
3 - 2 = 2x + x
1 = 3x
1/3 = x
2)
(x + 3)/10 = (3x - 2)/8
8(x + 3) = 10(3x - 2)
8x + 24 = 30x - 20
8x - 30x = -20 - 24
-22x = -44
x = -44/-22
x = 2
3)
(x - 1)/(x + 1) = (2x - 4)/(x + 4)
(x - 1)(x + 4) = (2x - 4)(x + 1)
x² + 4x - x - 4 = 2x² + 2x - 4x - 4
x² + 3x - 4 = 2x² - 2x - 4
2x² - x² - 2x - 3x - 4 + 4 = 0
x² - 5x = 0
x(x - 5) = 0
x = 0 x - 5 = 0
x = 5
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Verified answer
Respuesta:
Explicación paso a paso:
Explicación paso a paso:
1) (3 - x)/(x + 1) = 2/1
1(3 - x) = 2(x + 1)
3 - x = 2x + 2
3 - 2 = 2x + x
1 = 3x
1/3 = x
2)
(x + 3)/10 = (3x - 2)/8
8(x + 3) = 10(3x - 2)
8x + 24 = 30x - 20
8x - 30x = -20 - 24
-22x = -44
x = -44/-22
x = 2
3)
(x - 1)/(x + 1) = (2x - 4)/(x + 4)
(x - 1)(x + 4) = (2x - 4)(x + 1)
x² + 4x - x - 4 = 2x² + 2x - 4x - 4
x² + 3x - 4 = 2x² - 2x - 4
2x² - x² - 2x - 3x - 4 + 4 = 0
x² - 5x = 0
x(x - 5) = 0
x = 0 x - 5 = 0
x = 5
2.- 2
3.- 0 o 5