x + (x + 2) + (x + 4) = -84.....combine like terms 3x + 6 = - 84.......subtract 6 from each side 3x = -84 - 6 3x = - 90...divide both sides by 3 x = -90/3 x = -30
This is actually just a simple multiplication question. How many times do we need to multiply 3 to get 24? 3 x 8 is 24, and therefore we can conclude Ava needs to sell 8 cups of lemonade to earn $24.
Do 5.4 plus 5.8 then do 3.4w minus 1.8w and whatever you get for each is your key to the expression. So if you were to solve the answers like A you would do 7(1.6+w) and see what you would get. Obviously A isn't the answer. Sorry, this is hard to explain. But the answer is C