SOLUTION: tanslate five times the sum of m is the same as seven times n

You left out some words.  
If it were:

then it would make sense.

Let's assume it was:

then we replace the words "the sum of m and 3" by  "(m+3)" 
because "sum" means to add. So now you have:

Now replace the words "five times (m+3)" by "5(m+3)".
Now you have

Now replace the words "is the same as" by an equal sign " = "
Now you have

Finally replace the words "seven times n", by "7n". and you
now have the translation:

Edwin