Please help can I also have the explanation?

33 batteries

Step-by-step explanation:

14 batteries per 3-night trip

(14/3):  batteries used per night

(14/3)* 7(nights) = (98/3) ≈ 33 (you have to round up)

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3