Question

Bardzo łatwe kl 8.




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Answer 1

Odpowiedź:

a) 2 - 15x + 20 = 30 + 5x

-15x - 5x = 30 - 20 - 2

-20x = 8

x = -8/20

x = -2/5

b) x + x/2 - 2x + x/2 = 1 + 1

x + 2x/2 - 2x = 2

x + x - 2x = 2

2x - 2x = 2

0 = 2

c) 6x - 9 = 5x

6x - 5x = 9

1x=9

d)[tex]x^{2}[/tex] - x + 2x - 2 = [tex]x^{2}[/tex] + 5x

[tex]x^{2}[/tex] - x + 2x - [tex]x^{2}[/tex] - 5x = 2

x - 5x = 2

-4x = 2

x = -0,5

e) 2x + 1 = 5x

2x - 5x = -1

-3x = -1

x = 1/3

f) -1x + 6[tex]x^{2}[/tex] = 6[tex]x^{2}[/tex] - 12x

6[tex]x^{2}[/tex] - 6[tex]x^{2}[/tex] = -12x + 1x

0 = - 11x

0 = x