contestada

Which of these is the solution to the system of equations?
Y=12x-18
Y=13x-18

Is it a. (-18,0)
B. (0,-18)
C. (1,-6)
D. (1,-5)

Respuesta :

mzel3730
The best way to solve is by elimination.
First, write the equations in standard form.
12x-y=18
13x-y=18
Multiple the bottom equation by -1
 12x-y=18
-13x+y=-18
Add.
-x=0
x=0 Plug into other equation
12(0)-y=18
0-y=18
-y=18
y=-18
Your answer is B. (0,-18)