Question 940139

How do I set up these word problems?

1. The sum of two numbers is 18. The greater number is 3 less than twice the smaller one.

2. The difference between two numbers is 25. The greater one is 3 more than twice the lesser one. What are the two numbers? 
<pre>
Let smaller number be S
Then larger = 18 - S
Therefore, 18 - S = 2S - 3
- S - 2S = - 3 - 18
- 3S = - 21
S, or smaller number = {{{(- 21)/(- 3)}}}, or {{{highlight_green(7)}}}
Larger number: 18 - 7, or {{{highlight_green(11)}}}

Can you do "2" now?