Solving Systems of Equations Easy

-5x - 4y = -9
y = 6

• (3, 6)

• (-3, 6)

• (6, -3)

• (6.8, 3)

What is the solution to this system?
y = 2x + 1
y = 4x - 1

• (1,3)

• (-1,-3)

• (-1,3)

• (3,1)

Solve: (Show work on your answer document.)

y=8x+1

y=6x+3

• (1, 9)

• (4, 14)

• (0, 1)

• (2, 4)

If a system of equations has no solution, what does the graph look like?

• intersecting lines

• parallel lines

• skew lines

• intersecting lines

Solve the following systems of equations using substitution:

y = 8

y = -4x + 4

• (8, -1)

• (-28, 8)

• (-1, 8)

• (8, -28)

What is the first step of solving a system of equation by substitution?

• guess and check

• set the equations equal to each other

• Isolate one variable

• plug it in your calculator

Solve:
y = 8x + 2
y = -x - 7

• (1, 10)

• (-1, -6)

• (2, 7)

• (9, 9)

Solve:
y= 4x + 9
y = 5x + 10

• (-1, 5)

• (9, 19)

• (-1, -1)

• (9, 1)

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.

Which option shows the CORRECT substitution for this system?