Question 329034
let number of melons she bought be x
she paid $300 for x melons

..
she made a profit of 1.50 per melon
she sold x-30 melons
she made a total profit of 1.50*( x -30)
..

1.50(x-30)= 300
1.50x - 45=300
1.50x = 300+45
1.50x = 345
x= 345/1.50
x= 230 melons