If y=7+(3 − 2x), then x=?

The authors use the word “backbone” in lines 3 and 39 to indicate that

You are getting ready to transport troops in a m1152 configured with cargo cover and troop seats which of the following should you do before starting out

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.