Hola!
19. 8x - 4 + 3x = 7x + x + 14
11x - 4 = 8x + 14
11x - 8x = 14 + 4
3x = 18
x = 6
30.
[tex]10z - 5 + 7z - 10 + 8z = 2z - 6 + 4z - 8 \\ 25z - 15 = 6z - 14 \\ 25z - 6z = - 14 + 15 \\ 9z = 1 \\ z = \frac{1}{9} [/tex]
Saludos.
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Hola!
19. 8x - 4 + 3x = 7x + x + 14
11x - 4 = 8x + 14
11x - 8x = 14 + 4
3x = 18
x = 6
30.
[tex]10z - 5 + 7z - 10 + 8z = 2z - 6 + 4z - 8 \\ 25z - 15 = 6z - 14 \\ 25z - 6z = - 14 + 15 \\ 9z = 1 \\ z = \frac{1}{9} [/tex]
Saludos.