Let’s give these two numbers variables
Let ‘a’ be the larger number
Let ‘b’ be the smaller number
Now from the question we know:
a + b = 30 or a = 30 - b
2a - 3b = 5
Now, let’s plug the first equation into the second to find ‘b’:
2(30 - b) - 3b = 5
60 - 2b - 3b = 5
60 - 5b = 5
55 = 5b
b = 11
Now we solve for ‘a’:
a = 30 - b
a = 30 - 11
a = 19
Now the question asks for the positive difference between the two numbers, so:
a - b = ?
19 - 11 = 8
Hope this helps!
The minimum is <em>X=1</em> and <em>Y=3</em>, so the minimum is <em>x=3</em>. Use a graphing calculator then Google Search, "<em>How to find the minimum of a graph using a graphing calculator.</em>". The process of this is way to long to explain here, and is best explained visually.
