Systems of Equations by Graphing, Substitution, Adding or Subtracting

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

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Which method is most appropriate?

• Substitution

• Elimination

• Graphing

Which method is most appropriate?

• Substitution

• Elimination

• Graphing

Which method is most appropriate?

• Substitution

• Elimination

• Graphing

Which operation would allow elimination by either addition or subtraction? (check all that apply---take your time!)

• Double the bottom row

• Divide the top row by 2

• Multiply the bottom row by 4

• Multiply the top row by 4

• Multiply the top row by 2 and the bottom row by 4

Solve the system of equations.
x + 2y = -3
x - y = -12

• (-9, 3)

• (-7 ,5)

• (3, 15)

• (9, 6)

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

• (-4, 2)

• (4, 2)

• (2, -4)

• (2, 4)

What is the solution to the following system:

^{y = 5x}

^{3x + y = 24}

• ^{(15, 3)}

• ^{(3, 5)}

• ^{(3, 15)}

• ^{(5, 3)}

y = 2x + 1
3x + y = 16

• x = 3

• (2, 7)

• (3, 5)

• (3, 7)

Which is the correct setup for SUBSTITUTION for the systems:

• 8x+5(-3x-6)=-9

• 8(-3x-6)+5y=-9

• 8x+5y=-3x-6

• y=-3(8x+5y)-6