Question

Ming and ivy each sell lemonade. Ming spends $15 on supplies and and all plans to charge $1.50 per cup. Ivy spends $20 on supplies and plans to charge $1 per cup. How many cups of lemonade will each of them have to sell to earn the same amount of money?

Answer 1

They need to sell 30 cups of lemonade for them to earn the same amount of money.

Explanation:

1. Write out the equation:

-
`1.5x - 35= x - 20`

2. Subtract x on both sides to isolate the variable on one side of the equation:

`1.5x - x - 35 = x - x - 20`

3. Solve for x:

`0.5x - 35 =  -20`

`0.5x - 35 + 35 = -20 + 35`

`0.5x = 15`

`0.5x/0.5 = 15/0.5`

`x =30`

Answer 2

Explanation:

1.5x - 15 dollars = x - 20 Add 15 to both sides.

1.5x - 15 + 15 = x - 20 + 15

1.5x = x - 5 They will never coincide.

1.5x-x = - 5

0.5x = - 5 Multiply by 2

x = - 10

I would check your question.