Question

Solve the following system of equations.

Answer 1

Let eqn 1 be y = -2x -15

and Eqn2 be y-3x =-15

Substitute Eqn 1 into Eqn 2

where -2x-15-3x = -15

-5x = 0

X is 0

from Eqn1 the value of y Will be

-2(0) - 15

Value of y is -15

Therefore (X,y) = (0, -15)

Answer 2

x= 0, y= -15

Explanation:

Start by labelling the 2 given equations.

y= -2x -15 -----(1)

y= -15 +3x

y= 3x -15 -----(2)

Substitute (1) into (2):

-2x -15= 3x -15

3x +2x= -15 +15

5x= 0

Divide both sides by 5;

x= 0

Substitute x= 0 into (2):

y= 3(0) -15

y= -15