Help me plzzz its too hard

c. 4 and 1/2 pounds is the answer! : )

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.

could u provide us some answer choices or hmm idk maybe a table for us to anser with ? ?