Question

Rozwiąż równania: a) 2 - x = 5 - 2x b) 69 - x = x + 96 c) 1/2c + 5 = c + 8

Answer 1

a ) 2 = 5 - x / - 5

- 3 = - x / *-1

x = 3

 

b) 69 = 2x + 96

x = 96 - 69 / :2

x = 13.5

 

c) 1/2 c + 5 = c + 8

1/2 c = c + 3

- 1/2 = 3 / * -2

c = -6

Answer 2

a)2-x=5-2x                  +2x

  2+x=5                        -2

x=3

b)69-x=x+96                -x

69-2x=96                   -69

-2x=27

x=-13,5

c) 1/2c + 5 = c + 8       -8

1/2 c-3=c                     -1/2c

-3=0,5c

c= -6