On both problems x should equal 3
4w+x-4
Because when multiplying by a negative with a negative you will get a positive and multiplying a negative with a positive will get you a negative
1/2 of the pizza is eaten in an hour. To get from 1/2 an hour to 1 hour, you multpily by 2. Multiply 1/4 by 2 to get 1/2.
2x - (3/4) = (15/4)
We need to get x by itself. First add 3/4 to both sides.
2x = 18/4
Now divide both sides by 2
x = 18/8 or 9/4
