Find the point of intersection of the two lines.
-4x + 4 = 4y
y = 2x
​

Use the elimination method to solve the system of equations.
x + y = 7
2x + y = 11

How do you solve this system of non-linear equations?
x² + y² = 25
2x + 4y = -10

A fashion designer makes and sells hats.  The material for each hat costs $5.50.  The hats sell for $12.50 each.  The designer spends $1400 on advertising.  How many hats must the designer sell to break even?

How do you solve the system of equations:
y = 2x - 4
y = 4x - 10

Find the solution to the system by the substitution method. 
3x – 5y = 7 
x – 4y = -7 

How do you solve the system with the substitution method?
x - y = 10
-x - y = 20

Solve the system of equations for x and y:
y = 3x
2x - 3y = 14