solving systems

Give the solution to the system.

• (3,1)
• (1,3)
• (-1,3)
• (1, -3)

Solve by graphing.
y = 2x + 1
y = 4x - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

Solve this system of equations by graphing.

y = 1/2x + 2

y = -3x + 9

• (2, 3)

• (-2, -3)

• (3, 2)

• (-3, 2)

Solve by substitution

• Infinite number of solutions

• (0, 7)

• (-5, -7)

• (5, 7)

• Infinitely many solutions

• (-1,5)

• (7,-2)

• No solution

• (6,-2)

• (4,-8)

• Infinitely many solutions

• No solution

Solve using elimination. 
 4x + 8y = 20
-4x + 2y = -30

• (-7,1)
• (2,-5)
• (-2,5)
• (7,-1)

Solve by elimination
4x-6y= -6
-2x-12y= -12

• (0,1) 
• (1,0)
• (1,1)
• (2,1)

solve the system by elimination

• No solution

• infinite solutions

• (0,0)

• (5,1)

• (5,0)

Solve the system by matrices.

  5x + 8y = -12

3x + 5y = -7

• (1, -10)
• No solution
• (-4, 1)
• (1, 10)