What is the y-coordinate of the solution for the system of equations?
x-y=12
27+3y=2x
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-y=12-x. (1)
y=(2x-27)/3. (2)
add equation 1 by 2
0=12-x+(2x-27)/3
3=12-x+2x-27
3=-15+x
x=3+15
x=18
put value of x in 1 eq
-y=12-18
-y=-6
y=6
y=(2x-27)/3. (2)
add equation 1 by 2
0=12-x+(2x-27)/3
3=12-x+2x-27
3=-15+x
x=3+15
x=18
put value of x in 1 eq
-y=12-18
-y=-6
y=6
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