SOLUTION: what is a if the lines with equations y=ax+5 and 2y=(a+4)x-1 are parallel?

Question 640950: what is a if the lines with equations y=ax+5 and 2y=(a+4)x-1 are parallel?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
what is a if the lines with equations y=ax+5 and 2y=(a+4)x-1 are parallel?
.
If two lines are parallel, they have the same slope.
slope of:
y=ax+5
is 'a'
.
slope of:
2y=(a+4)x-1
y=((a+4)/2)x-1/2
is (a+4)/2
.
equation is:
a = (a+4)/2
2a = a+4
a = 4

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