1) 7а-19а+28а-2а 2)-8х+16х-23х+17х 3)2,7m-n+3,5m-2,7m 4)2,9t+1,8-5,2t-1,2...

Question

1) 7а-19а+28а-2а
2)-8х+16х-23х+17х
3)2,7m-n+3,5m-2,7m
4)2,9t+1,8-5,2t-1,2
5)2,6p-0,7k+1,3-3,1p+2,8k

Comments

8х+16х-23х+17х

Answer 1

1 7а-19а=-12а
  -12а+28а=16а
  16а-2а=14а