I dont understand this at all can someone do it for me?

 go to https://www.symbolab.com/solver/equation-calculator and input it there. I know it may seem like im giving you just the answer, but see how the problem is solved on the site. You need to solve for x. Lets say an example is x-4=8. You need to add 4 to -4 and 4 to 8,since -4 is negative you do the opposite, and if it was positive you do negative. It cancels out with -4, so adding 4 to 8 is 12 is x=12. You can check your answer by inputing it back into the problem, so 12-4 does equal 8, so it is right. If a problem has multiplication, do division,

and if it has division, do multiplication and vice versa. If that didnt help then i can do these specific problems and explain them in detail

Step-by-step explanation:

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)