Question

Ling wants to save $87 for tickets to a rock concert if she has $23 now and will save $4 per week how long it take her to get enough money to buy the tickets

Answer 1

In this case we have that the total cost of the tickets is $87.If she is $23, then she is missing:

$87-23 = 64$

He is missing $64.

If you can save $4 per week we have:

$4x \geq64$

Where "x" represents the number of weeks to work:

$x \geq \frac {64} {4}\\x \geq16$

So, Ling must work at least 16 weeks to get the money he needs for concert tickets.

Answer:

16 weeks