Which is the most efficient way to solve this equation?
X + 7 = 12

○Subtract 12 from both sides of the equation so all terms will
be on the same side of the equal sign.
○Add -7 to both sides because that will result in an equivalent
equation with x alone on one side
○Nothing, because the equation is already solved
○Add 7 to 12 because x equals 19.

Answer soon(fast) 15 pts-brainliest? for right answer with small explination a restaurant catered a party for 40 people. a child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. the total cost of the dinner was $728. how many children and adults were at the party? use the table to guess and check.(i couldn't get the graph onto the question)                                8 children and 32 adults9 children and 31 adults10 children and 30 adults12 children and 28 adults

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Rosy waxes 2/3 of her car with 1/4 bottle of car wax.at this rate,what fraction of the bottle of car wax will rosey use to wax her entire car