Substitution Method Algebra

Using Substitution Method, Solve this system of equations

• (2,1)

• (1,2)

• (3,-2)

• (3,4)

• (4,3)

When you start Substitution Method you need to....

• Make one equation equal to zero

• Make one equation equal to X + Y

• Make one equation stacked on top of the other equation

• Make one equation equal to a single variable

• Make one equation equal to both varaibles

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

• (-2,-4)

• (-2,3)

• (-4,-1)

• (1,-1)

• (1,0)

Solve the following systems by substitution

3x + y = 21

y = 2x + 1

• ( -4, -9)

• (9, 4)

• (4, 9)

• (-9,-4)

Solve the following systems by substituion

10x - y = 23

y = x + 4

• (3, 7)

• (7, 3)

• (-3, 7)

• (-7, -3)

Solve the following System of Equations using the Substitution Method:

• (2, -8)

• (1, -11)

• no solution

• (-12, -40)

Solve the system of equations using the Substitution Method

• (-6, 1)

• (0, 0)

• No solution

• Infinite solutions

Solve:
y = 7x + 9
2y + 2x = -18

• (5, 0)

• (9, 18)

• (-2, -5)

• (1, 16)