Tickets to a concert cost $2 for children and $5 for adults. if 630 people attended the concert and the ticket sales totaled $2,910, how many children attended the concert?

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.