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Na jutroooo liczę na najjj

Na Jutroooo Liczę Na Najjj class=

Odpowiedź :

Liwiaheberlej23viz

Odpowiedź:

a) -(2x - 1) = 4

-2x + 1 = 4 | -1

-2x = 3 | :(-2)

x = -1,5 (-1½)

b) 2(x + 1) = x

2x + 2 = x |-2

2x = x - 2 | -x

x = -2

c) 2t - (3t + 1) = 6

2t - 3t - 1 = 6 | +1

-t = 7 | : (-1)

t = -7

d) -(4 + x) = 2(3 - x)

-4 - x = 6 - 2x | +4

-x = 6 - 2x + 4 | +2x

-x + 2x = 10

x = 10

e) 3(y + 6) - y = 2(y + 9)

3y + 18 - y = 2y + 18 |-2y

3y + 18 - y - 2y = 18 | -18

0 = 0

f) x - 7 - 2(3x + 5) = 3

x - 7 - 6x - 10 = 3 | +7

-5x - 10 = 10 | + 10

-5x = 20 | : (-5)

x = -4

Liczę na naj ^^

Basetlaviz

[tex]a)\\-(2x-1) = 4\\\\-2x+1 = 4\\\\-2x = 4-1\\\\-2x = 3 \ \ /:(-2)\\\\x = -1,5[/tex]

[tex]b)\\2(x+1) = x\\\\2x+2 = x\\\\2x-x = -2\\\\x = -2[/tex]

[tex]c)\\2t-(3t+1)=6\\\\2t - 3t -1 = 6\\\\-t = 6+1\\\\-t = 7 \ \ /:(-1)\\\\t = -7[/tex]

[tex]d)\\-(4+x) = 2(3-x)\\\\-4-x = 6 - 2x\\\\-x+2x = 6+4\\\\x = 10[/tex]

[tex]e)\\3(y+6)-y = 2(y+9)\\\\3y+18-y = 2y+18\\\\2y+18 = 2y+18\\\\2y-2y = 18-18\\\\0 = 0[/tex]

Równanie tożsamościowe, nieskończenie wiele rozwiązań.

[tex]f)\\x-7-2(3x+5) = 3\\\\x-7-6x-10 = 3\\\\-5x-17 = 3\\\\-5x = 3+17\\\\-5x = 20 \ \ /:(-5)\\\\x = -4[/tex]

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