Lisa's Responses in WyzAnt Answers

-x +3 > 7

The greater than or less than signs act the same as an equal sign.  First we want to isolate the letter.  To do that we need to move the +3 over to the other side of the equation.  Since the problem says +3 we are going to do the opposite of -3 to both sides of the equation.  +3-3= 0 so the three on the left side of the inequality sign cancels out.  7-3 = 4.  Now the equation should read -x > 4.  You want the letter to be positive so we need to multiply the whole equation by -1.  -x times -1 gives you a positive x.  Positive 4 times -1 gives you negative 4 so the answer is x = -4

First thing is to make sure that your denominators are the same.  The denominator is the bottom number of the fraction.  Find the LCD, least common denominator so for example if you are trying to add 3 and 1/4 plus 2 and 1/3 you need to find a multiple that the numbers 3 and 4 both have in common.  They might have many numbers in common so you have to find the smallest number they have in common.  In this case the number is 12, both 3 and 4 can go into 12 evenly.  to make 1/3 have a denominator of 12 you have to multiply the whole fraction by twelve.  4/12 is what 1/3 becomes.  then you have to make 1/4 have a denominator of 12 also 1/4 will become 3/12.  Now that your fractions have the same denominator you just add.  Add the fractions first and then add the whole numbers.  So my sample problem of 3 and 1/4 plus 2 and 1/3 becomes 3 and 3/12 plus 2 and 4/12 = 5 and 7/12.  After you add you try to simplify the fraction if possible.  5 and 7/12 can't be simplified so this would be the final answer.