4. Presley and Amber are members of their high school swim team. Presley swims 42 laps each practice. Amber swims 30 laps each practice, and last
summer. Amber swam 324 extra laps. Write an equation to represent
after how many practices, x, each girl will swim an equal number of laps,

89

step-by-step explanation:

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.