Math Help - equation set up

1. equation set up

The product of 2 numbers is 800. The difference is 7.

annndddddd.

The sum of 3 numbers is 47. the second number is 5 time bigger than the smallestt.the third number is 5 times larger than the second number.

2. Originally Posted by Buttnessa
The product of 2 numbers is 800. The difference is 7.

?
$xy = 880$
$x-y=7$

3. Originally Posted by Buttnessa
The sum of 3 numbers is 47. the second number is 5 time bigger than the smallestt.the third number is 5 times larger than the second number.
Let the smallest number be $x$, so the median number is $5x$, and the largest number is $5(5x) = 25x$

there sum is 47, so we have:

$x + 5x + 25x = 47$

now continue