Point of Intersection by Substitution

Solve the system of equations.
y = 4x+1
3x + 2y = 13

• (1, 5)

• (5, 1)

• (0.25, 2)

• ∅

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

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Solve this system by substitution.

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

Solve for x and solve for y
3x  - 3y = 33
6x - 3y = 57

• (8,-3)

• (-3,8)

• (10,1)

• (10,-1)

Solve the following system of equations. What is the point of intersection of the two lines?

y = 2x and y = -x + 6

• (2, 4)

• (6, 12)

• (3, 6)

• (-2, 4)

Solve the system by substitution.
 
5x + 4y= −14
y =  −7x  −  15 

• (-2, -1)

• (1, -2)

• (-2, 1)

• (-1, -2)

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 system by using the substitution method

How many solutions does the graph have?

• One solution

• No solution

• Infinite solutions

If angle AOD is 124 - 2x and angle DOB= 9x, what is the measure of angle DOB?

• 72

• 8

• 108

• 63