PC 7.1-7.3 Review Solving Systems of Equations

(-1, 2)

-4x + 5y = 14 y = 3x + 5

(-1, 1)

-5x + 7y = 12 y = -2x - 1

(-3, 6)

5x + 5y = 15 y = -4x - 6

(2, -1, -1)

5x - 2y + z = 11 2x + y + 3z = 0 6x - 2y - 2z = 16

(-24, -15)

Solve this system of equations using elimination: -3x + 4y = 12 3x - 6y = 18

(6, -6)

Solve this system of equations using elimination: -4x - 2y = -12 4x + 8y = -24

(-1, -1)

Solve this system of equations using elimination: -6x + 5y = 1 6x + 4y = -10

(2, 1)

Solve this system of equations using elimination: 2x + 5y = 9 3x - 5y = 1

(7, -1)

Solve this system of equations using elimination: 4x + 8y = 20 -4x + 2y = -30

no solution

Solve this system of equations using elimination: 4x - y = 10 -4x + y = 6

(4, -1/2)

Solve this system of equations using elimination: x - 2y = 5 2x + 2y = 7

(10, 15)

Solve this system of equations using elimination: x - y = -5 x + y = 25

(8, -2, 3)

x - 2y + z = 15 2x + 3y - 3z = 1 4x + 10y - 5z = -3

(4, 5, -2)

x = -2z 3x - 2y + z = 0 -2x + y - z = 1

(-3, -3)

y = 6x + 15 -x - y = 6