Упростите: 0,9(0,4-1 2/3m)-0,2(0,8- 7 1/2)

Question

Упростите:
0,9(0,4-1 2/3m)-0,2(0,8- 7 1/2)

Answer 1

0,9(0,4-1 2/3m)-0,2(0,8-7 1/2)= (0,36-1,5m)-(0,16-1,5)=0,36-1,5m-0,16+1,5=1,7-1,5m