Standard+2.7a-yd

Standard 2.7a
While adding and subtracting rational expressions is a royal pain, solving rational equations is much simpler. (Note that I don't say that it's "simple", just that it's "simpler".) This is because, as soon as you go from a rational expression (with no "equals" sign in it) to a rational equation (with an "equals" sign in the middle), you get a whole different set of tools to work with. In particular, you can multiply through on both sides of the equation to get rid of the denominators.

Example Problems for Standard 2.7a
problem 1 is easy 2/x-1= 3/x-1 All you have to do is cross multiply: 2(x + 1) = 3(x – 1). Distribute the numbers: 2x + 2 = 3x – 3. Move the x to the same side: 2 = x – 3. Move the -3 to the other side: 5 = x. problem 2 9/a-3= 3/a+5

Podcast for Standard 2.7a
Below is a tutorial on understanding two-step equations and how to solve the problems.