substitute x for y-1
2(y-1)-y=6 distribute
2y-2-y=6 subtract y in 2y
y-2=6 add 2 to get y by itself
y=8
Put y back into equation x=y-1
x=8-1
X=7
If the y-intercepts are the same, the two equations represent the same line and there are INFINITELY MANY SOLUTIONS
22 gallons is 83.279 liters
I think that the answer is c