To use substitution to solve a system of equations, one of the equations must be solved for a variable.
What is the solution of the system? Use substitution.
Know | Need | Plan |
---|---|---|
Neither equation is solved for one of the variables. | The solution of the system | Solve one of the equations for one of the variables. Then use the substitution method to find the solution of the system. |
Which variable should you solve for?
If one equation has a variable with a coefficient of 1 or
Step 1 Solve one of the equations for one of the variables.
Step 2 Substitute
Step 3 Substitute 2.3 for x in either equation and solve for y.
The solution is (2.3, 1.6).
✓ Got It?
What is the solution of the system? Use substitution.