Bah its always these I get stuck on.
1. A man walks 18km he goes .5km/h faster than planed and reaches destination 30mins early. What was his planned speed.
2. Chess tournament as 45 games everyone plays together once. How many players attend.
For number one I used these equations but couldnt come out with anything
And for number two I got 10 people which is right answer but I did with arithmetic and my teacher wants algebra.