Practice Test Questions 1

Question

Solve the system of equations.

y = -3x + 4

x + 4y = -6

A. x = -2, y = -1

B. x = -2, y = 10

C. x = 2, y = -2

D. x = 3, y = -5

E. x = 4, y = -8

Answer 1

Use Substitution

x + 4(-3x + 4) = -6

Can you solve for x and y?

Answer 2

Answer 3

y = -3x + 4 and x + 4y = -6

x + 4(-3x + 4) = -6

-11x + 16 = -6

-11x = -22

x = 2 and y = -3(2) + 4 = -2