Question

Rozwiąż równanie i sprawdź otrzymany wynik.

a)3x+9=-3x+9

b)-27x+1=2x+59

c)45x-19=19x-45

d)82x-9=-18x+1

Answer 1

a)3x+9=-3x+9

6x=0

x=0

3*0+9=-3*0+9

9=9

b)-27x+1=2x+59

-29x=58

x=-2

-27*(-2)+1=2*(-2)+59

55=55

c)45x-19=19x-45

26x=-26

x=-1

45*(-1)-19=19*(-1)-45

-64=-64

d)82x-9=-18x+1

100x=10

x=0,1

82*0,1-9=-18*0,1+1

-0,8=-0,8

 

Pozdrawiam i liczę na naj... :-))

Answer 2

a)

3x+9 = -3x+9

3x+3x = 9-9

6x = 0 |:6

x = 0

=================

L = 3*0+9

L = 0+9

L = 9

P = -3*0+9

P = 0+9

P = 9

L = P

 

b)

-27x+1 = 2x+59

-27x-2x = 59-1

-29x = 58 |:(-29)

x = -2

=================

L = -27*(-2)+1

L = 54+1

L = 55

P = 2*(-2)+59

P = -4+59

P = 55

L = P

 

c)

45x-19 = 19x-45

45x-19x = -45+19

26x = -26 |:26

x = -1

=================

L = 45*(-1)-19

L = -45-19

L = -64

P = 19*(-1)-45

P = -19-45

P = -64

L = P

 

d)

82x-9 = -18x+1

82x+18x = 1+9

100x = 10 |:100

x = 0,1

=================

L = 82*0,1-9

L = 8,2-9

L = -0,8

P = -18*0,1+1

P = -1,8+1

P = -0,8

L = P