Question

Ecuaciones lineales, ayuda!

3x^{2} -2x+8 = 3x^{2} -12x-3

7x+8(3x-2) = 18(3x-12)

13x-12(5x-2) = 13(x-2)

10x-2+3(7x+5) = 12-3(7x+5)


No pude insertar esta:

1/4 (8x-12) = 1/3 (9x-18)

Me urgen! [/tex]

Answer 1

3x² - 2x + 8 = 3x² - 12x - 3
3x² - 3x² - 2x + 12x = - 3 - 8
10x = - 11
x = - 11/10

Rpt. El valor de x es - 11/10
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7x+8(3x-2) = 18(3x-12)
7x + 24x - 16 = 54x - 216
31x - 16 = 54x - 216
31x - 54x = - 216 + 16
- 23x = - 200
x = - 200/-23
x = 200/23

Rpt. El valor de x es 200/23
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13x-12(5x-2) = 13(x-2)
13x - 60x + 24 = 13x - 26
- 47x + 24 = 13x - 26
- 47x - 13x = - 26 - 24
- 60x = - 50
x = - 50/-60
x = 5/6

Rpt. El valor de x es 5/6
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10x-2+3(7x+5) = 12-3(7x+5)
10x - 2 + 21x + 15 = 12 - 21x - 15
10x + 21x + 15 - 2 = - 21x + 12 - 15
31x + 13 = - 21x - 3
31x + 21x = - 3 - 13
52x = - 16
x = - 16/52
x = - 4/13

Rpt. El valor de x es - 4/3
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1/4 (8x-12) = 1/3 (9x-18)
1 (8x - 12)/4 = 1 (9x - 18)/3
(8x - 12)/4 = (9x - 18)/3
3 (8x - 12) = 4 (9x - 18)
24x - 36 = 36x - 72
24x - 36x = - 72 + 36
- 12x = - 36
x = - 36/-12
x = 3

Rpt. El valor de x es 3