Question

Directions: Solve each system of equations algebraically. Verify the solution using the graph of the system. 1. y=-x-4 y=3.x y 5

Answer 1

y=-x-4 (a)

y=3x (b)

Put (b) into (a) and solve for x:

3x=-x-4

3x+x = -4

4x= -4

Divide both sides by 4

4x/4 = -4/4

x= -1

Replace the value of x on any equation:

y=3x = 3(-1) = -3

Solution : (-1,-3)

Graph: