Rozwiąż równania 4y + 2 x 25 = 90 2y + 13 =29

4y + 2 x 25 = 90 4y + 50 = 90 4y = 40 1y = 10 2y + 13 =29 2y = 29 – 13 2y = 16 1y = 8

4y + 2 x 5 =90 4y = 90 - (2 x 5) 4y = 90-10 4y = 80 y = 80 : 4 y = 20 2y + 13 = 29 2y = 29 - 13 2y =16 y = 16 : 2 y = 8

4y+ 50=90/-50 4y=40/:4 y=10 2y+13=29/-13 2y=16/:2 y=8 pozdro. :)