Solving Systems by Substitution Error Analysis

What is the first step in solving a system by Substitution?

• Make sure both equations are in standard form.

• Make sure at least one equation is solved for one variable.

• Make sure both equations are in slope-intercept form.

• Make sure both equations can be solved.

• (4, -3)

• (-1, -3)

• (-4, -3)

• (-4, 3)

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

• Infinite number of solutions

• (0, 7)

• (-5, -7)

• (5, 7)

Use substitution to find the solution to the system of equations.

• (4,0)

• (-4,0)

• (0,4)

• (0,-4)

Solve the system by substitution

• (1,1)

• (-1,1)

• (-1,0)

• (1,-1)

Use substitution to find the x-coordinate of the solution.

• 2

• No solution

• -2

• -8

Solve this system by substitution.

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

Solve the following system by substitution.  What is the solution?

• (1, -2)

• (-2, 1)

• (-4, 1)

• (2, 1)

Use substitution to find the x-coordinate of the solution.

• No solution

• -6

• 6

• Many solutions