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Rozwiąż równania:

-x - 2 = -11

-5x +3 = -12

4x - 6 = 26













3x - 5 = 4 + 2x











7x + 14 = 5x -22











-5x + 12 + x = 2x - 12













2(x + 4) - 5(x + 3) =2















2(x- 3) + 3(4 - x) = 5







3(x- 4) -2(2x + 3) = -6


Odpowiedź :

a) -x-2=-11
-x=-11+2
-x=-9
x=9

b) -5x+3=-12
-5x=-12-3
-5x=-15
-x=-3
x=3

c) 4x-6=26
4x=26+6
4x=32
x=8

Odpowiedź:

-x-2= -11 |+2

-x= -9

x=9

-5x+3= -12 |-3

-5x= - 15 |:-5

x=3

4x-6=26 |+6

4x=32 |:4

x=8

3x-5=4+2x |-2x

x-5=4 |+5

x=9

7x+14=5x-22 |+22

7x+36=5x

5x=7x+36 |-7x

-2x=36 |:-2

x= - 18

-5x+12+x=2x-12

-4x+12=2x-12 |-12

-4x=2x-24 |-2x

-6x=-24 |:-6

x=4

2(x+4)-5(x+3)=2

2x+8-5x-15=2

-3x-7=2 |+7

-3x=9 |:-3

x=-3

2(x- 3) + 3(4 - x) = 5

2x-6+12-3x=5

-x+6=5 |-6

-x=-1

x=1

3(x- 4) -2(2x + 3) = -6

3x-12-4x-6=-6

-x-18=-6 |+18

-x=12

x=-12

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