Leilah has not yet

Answer:

Leilah has yet to study 600 of her collection of 2400 flashcards. She studies 404040 new cards daily. 2400-40x=600

Stetson rents studio space costing $600 a month for music instruction. He charges $40 for each student per hour, resulting in a profit of $2400 this month.40x-600=2400

A kit consists of 600 letter tiles along with 40 number tiles. Each tile shares the same weight, leading to a total mass of 2400g (600+40)x=2400

Step-by-step explanation:

Answer:

40 * x - 600 = 0

Step-by-step explanation:

Initially, identify the variable (x) in the equation, representing the number of days it takes Leilah to review her flashcards. To study 600 out of her 2400 cards, having gone through 1800 already, we arrive at:

2400 - 1800 = 40 * x

rearranging leads to

40 * x - 600 = 0

This equation describes the situation above