Essica and her sister, Nicole, need money for lunch. Jessica receives $50 and buys lunches at the high school for $2.50 each and Nicole receives $40 and buy lunches at the elementary school for $1.50 each. How many lunches do they have to buy for the two girls to have the same amount of money in their account?
$50 - $1.50x = $40 - $2.50x
$50 - $1.50x = $40 - $2.50x
$50 - $2.50x = $40 - $1.50x
$50 - $2.50x = $40 - $1.50x
$50 + $1.50x = $40 + $2.50x
$50 + $1.50x = $40 + $2.50x
$50 + $2.50x = $40 + $1.50x