1) 6(m+2n)-3(2m+n)
6m+12n-6m-3n
6m-6m+12n-3n=9n
2) 9(0,4-c)-2(0,8-7c)
3,6-9c-1,6+14c
3,6-1,6-9c+14c=2+5c
1)=6m+12n-6m-3n=9n
2)=9(0,4-c)-1,6+14c=3,6-9c-1,6+14c=2+5c
1) 6(m+2n)-3(2m+n)
6m+12n-6m-3n
6m-6m+12n-3n=9n
2) 9(0,4-c)-2(0,8-7c)
3,6-9c-1,6+14c
3,6-1,6-9c+14c=2+5c
1)=6m+12n-6m-3n=9n
2)=9(0,4-c)-1,6+14c=3,6-9c-1,6+14c=2+5c