Pearson Algebra 2 Common Core, 2011
PA
Pearson Algebra 2 Common Core, 2011 View details
Cumulative Standards Review

Exercise 9 Page 759

Does either of the equations have an isolated variable in it?

D

Practice makes perfect

In this system of equations, at least one of the variables has a coefficient of Therefore, we will approach its solution with the Substitution Method. When solving a system of equations using this method, there are three steps.

  1. Isolate a variable in one of the equations.
  2. Substitute the expression for that variable into the other equation and solve.
  3. Substitute this solution into one of the equations and solve for the value of the other variable.
Observing the given equations, it looks like it will be simplest to isolate in the second equation.