Question

Rozwiążcie zadania 9+x=1,78 -2,2+x=6,1 -1,3y=10 -2,5c-8=17 0=3-(2x+1) 12y-(y+5)=10y-1 Błagam o pomoc

Answer 1

9+x=1,78 / -9                       -2,2+x=6,1/+2,2

x = -7,22                               x = 8,3

      

 

1,3y = 10 / : 1,3                  -2,5c-8=17 / +8

y = 7,7                                  -2,5c = 25 /: (-2,5)

                                                  c = -10

 

 

0 = 3 - (2x+1)                       12y - (y+5) = 10y -1

0 = 3 - 2x - 1                        12y - y -5 = 10y - 1

0 = 2 - 2x / +2x                    11y - 5 = 10y - 1 / -10y

2x = 2 / : 2                              y - 5 = -1 / +5

x = 1                                       y = 4

 

 

Myślę, że o to chodziło

pozdrawiam :)