Question

use the subtraction to solve system of equation

x+2y=12
-x=-y-6

a) (9,3)
b) ( 6,0)
c ( 8,2)
d) ( 7,1)

Answer 1

x+2y=12
-x=-y-6

The easiest way of solving this is to add the two equations together. This will result x to drop.
x+2y-x=12-y-6
3y=6
y=2
plug into one of the equations
x+2*2=12
x=8

Solution: (8.2)

Answer 2

thanks