Adding and Subtracting.

[math_morgan]

Can anyone help me on this problem?

(7m + 4n)-(2m - n)

so far i have:

7m + 4n
-2m-n
5m + 4
is this correct?

 

[Deleted member 4993]

Can anyone help me on this problem?

(7m + 4n)-(2m - n)

so far i have:

7m + 4n
-2m-n
5m + 4
is this correct? ..............NO

(7m + 4n) - (2m - n)

= 7m + 4n - 2m + n

= 7m - 2m + 4n + 1n

= 5m + 5n

 

[math_morgan]

thanks for your help