Answer:
The cost of one month of game play is $15
Step-by-step explanation:
Software package bought by Angie = 1
Game play bought by Angie = 1 month
Software package bought by Kenny = 2
Game play bought by Angie = 2 month
Cost of software package = $40
Total cost for Angie and Kelly = $165
Let the cost of game play be 'x'
Thus,
Total cost for Angie = $40 × 1 + 1x
Total cost for Kelly = $40 × 2 + 2x
also,
( $40 × 1 + 1x ) + ( $40 × 2 + 2x ) = $165
or
$40 + 1x + $80 + 2x = $165
or
$120 + 3x = $165
or
3x = $165 - $120
or
3x = $45
or
x = $15
Hence,
The cost of one month of game play is $15