Algebra Substitution

• (-2,-4)

• (-2,3)

• (-4,-1)

• (1,-1)

• (1,0)

Which method would be the easiest to solve with?

• Graphing

• Substitution Method

• Elimination Method

• Quantum Method

• Factoring Method

Using the Substitution Method, Solve for the system of equations

• x=3

  y=-2

• x=-2

  y=3

• x=1

  y=2

• X=-4

  y=3

• x=-3

  y=-6

Solve this system by substitution.

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

The first step in solving using the substitution method is __________.

• get x by itself

• get y by itself

• get either variable by itself

• add the equations together

Solve the following systems of equations using substitution:

2y + x = -15

x = 3y

• (-3, -9)

• (-9, -3)

• (-3, 9)

• (9, -3)

The solution (x, y) to a system of equations is the point where they...? 

• Run off the graph

• Don't touch

• Intersect

• Exist

Is (1,10) a solution to

y=7x+5

y=x+9

• yes

• no

Solve for x and y
3x + 2y = 16
7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Solve the system of equations.

• (10, 3)

• (6, 3)

• (15, 3)

• No solution

• Infinite Solution