PLZ FAST HELP ZA BRAK ODP ZGŁASZAM 7x-2=3 x +26 3x+7=-3x +19 -x- 1 = -3 x +17 9 x + 5 = 4 x -15 .... Question from @bartoszsobacki4

bartoszsobacki4 @bartoszsobacki4

June 2022 2 6 Report

PLZ FAST HELP
ZA BRAK ODP ZGŁASZAM
7x-2=3 x +26

3x+7=-3x +19

-x- 1 = -3 x +17

9 x + 5 = 4 x -15

-x + 5 = x +11

werunisiek

Odpowiedź:

7x-2=3 x +26 /-3x

4x -2 = 26 /+2

4x = 28 /:4

x = 7

3x+7=-3x +19 /-7

3x = -3x +12 /+3x

6x =12 /:6

x = 2

-x- 1 = -3 x +17 / +3x

2x -1 = 17 /+1

2x= 18 /:2

x=9

9 x + 5 = 4 x -15 /-5

9x = 4x -20 /-4x

5x = -20 /:5

x= -4

-x + 5 = x +11 / -5

-x = x +6 / -x

-2x = 6 / : -2

x = -3

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Magda

Odpowiedź:

$7x-2=3x+26\\\\7x-3x=26+2\\\\4x=28\ \ /:4\\\\x=7\\\\\\\\3x+7=-3x+19\\\\3x+3x=19-7\\\\6x=12\ \ /:6\\\\x=2\\\\\\\\-x-1=-3x+17\\\\-x+3x=17+1\\\\2x=18\ \ /:2\\\\x=9$

$9x+5=4x-15\\\\9x-4x=-15-5\\\\5x=-20\ \ /:5\\\\x=-4\\\\\\\\-x+5=x+11\\\\-x-x=11-5\\\\-2x=6\ \ /:(-2)\\\\x=-3$

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