Substitution Method

​Solving System of Equations with Substitution Method

Multiple Choice

Which of the following is the graph of y=3x-2

Multiple Choice

Which of the following is the graph of y=x+2

Multiple Choice

By looking at the graph what is the solution of this System of Equations?

• (1,3)

• (2,4)

• (-2,0.75)

• (1,2)

​We have now solved this System of Equations with Graphing.

We can also solve this Algebraically, by Substitution Method

​y=x+2

​y=3x-2

​What is the solution for

2y=3x+4 and 2x+1 =y

Multiple Choice

In Substitution Method the first step is to ..........

• Plug one of the equations into the other to solve for one of the variables

• Add both equations

Multiple Choice

After we find one of the variables.........

• We should use one of the original equations to find the other variable

• We should find the other variable by looking at the slope